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Geumcheon-gu, Seoul
153-814 South Korea
Tel : +82 70 4680 6817
Fax : +82 2 806 0946
Email: startools@daum.net

Long Reach

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2NB 2F Necked Ball End

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Features
• Extended neck style for long reach applications
• Used micrograin solid carbide excellent for high speed cutting
• Greater rigidity and reduced chattering through optimized geometry
• Nanocomposite coatings for improved wear resistance and longer tool life
• Improved workpiece surface quality
• For Dry cutting and Wet cutting

2NB.jpg

Tolerance

Cutting Dia.

D≤6: 0/-0.01
D>6: 0/-0.015

Radius

R≤0.25: 0/-0.005
R>0.25: 0/-0.01



Recommended workpiece Material :

◎:First choice   ○:Alternative choice   △:Limited choice

Carbon Steel/Alloy Steel
(up to 350 HB)
Stainless Steel
(up to 240 HB)
Cast lron
(up to 260 HB)
Prehardened Steel
(up to 50 HRc)
Hardened Steel
(45 to 55 HRc)
Super Hardened Steel
(55 to 68 HRc)
Titanium
Alloy
Copper
Alloy
Aluminum
Alloy
Resin &
Plastics
Graphite

(Unit: mm)

EDP No. Cutting Dia X Radius of Ball Nose
d X R
Neck Dia.

d1
Length of Cut

L1
Taper Angle

θ˚
Length of Reach

L2
Overall Length

L
Shank Dia

D
Actual Effective Length depending
on inclined angle of workpiece
Quantity
30'1˚30'
2NB 020 050 0.2 X R0.10.18 0.15 15 0.50 45 4 0.550.560.580.60.64
2NB 020 075 0.2 X R0.10.18 0.15 15 0.75 45 4 0.810.830.860.890.95
2NB 020 100 0.2 X R0.10.18 0.15 15 1.00 45 4 1.061.11.131.171.26
2NB 020 125 0.2 X R0.10.18 0.15 15 1.25 45 4 1.321.371.411.461.57
2NB 020 150 0.2 X R0.10.18 0.15 15 1.50 45 4 1.581.631.691.751.88
2NB 020 200 0.2 X R0.10.18 0.15 15 2.00 45 4 2.12.172.242.322.5
2NB 020 250 0.2 X R0.10.18 0.15 15 2.50 45 4 2.612.72.82.93.12
2NB 020 300 0.2 X R0.10.18 0.15 15 3.00 45 4 3.133.243.353.473.75
2NB 030 050 0.3 X R0.150.28 0.25 15 0.50 45 4 0.55 0.56 0.57 0.59 0.63
2NB 030 075 0.3 X R0.150.28 0.25 15 0.75 45 4 0.80 0.83 0.85 0.88 0.94
2NB 030 100 0.3 X R0.150.28 0.25 15 1.00 45 4 1.06 1.09 1.13 1.17 1.25
2NB 030 125 0.3 X R0.150.28 0.25 15 1.25 45 4 1.32 1.36 1.41 1.45 1.56
2NB 030 150 0.3 X R0.150.28 0.25 15 1.50 45 4 1.58 1.63 1.68 1.74 1.87
2NB 030 200 0.3 X R0.150.28 0.25 15 2.00 45 4 2.10 2.16 2.24 2.32 2.49
2NB 030 250 0.3 X R0.150.28 0.25 15 2.50 45 4 2.61 2.70 2.79 2.89 3.11
2NB 030 300 0.3 X R0.150.28 0.25 15 3.00 45 4 3.13 3.23 3.35 3.47 3.73
2NB 040 100 0.4 X R0.20.37 0.30 15 1.00 45 4 1.08 1.11 1.14 1.18 1.26
2NB 040 150 0.4 X R0.20.37 0.30 15 1.50 45 4 1.60 1.65 1.70 1.75 1.88
2NB 040 200 0.4 X R0.20.37 0.30 15 2.00 45 4 2.11 2.18 2.25 2.33 2.50
2NB 040 250 0.4 X R0.20.37 0.30 15 2.50 45 4 2.63 2.72 2.81 2.90 3.12
2NB 040 300 0.4 X R0.20.37 0.30 15 3.00 45 4 3.15 3.25 3.36 3.48 3.75
2NB 040 350 0.4 X R0.20.37 0.30 15 3.50 45 4 3.66 3.78 3.91 4.05 4.37
2NB 040 400 0.4 X R0.20.37 0.30 15 4.00 45 4 4.18 4.32 4.47 4.63 4.99
2NB 040 450 0.4 X R0.20.37 0.30 15 4.50 45 4 4.70 4.85 5.02 5.20 5.61
2NB 040 500 0.4 X R0.20.37 0.30 15 5.00 45 4 5.21 5.39 5.58 5.78 6.23
2NB 040 600 0.4 X R0.20.37 0.30 15 6.00 45 4 6.25 6.46 6.69 6.93 7.47
2NB 040 800 0.4 X R0.20.37 0.30 15 8.00 45 4 8.32 8.60 8.90 9.23 9.96
2NB 050 100 0.5 X R0.250.47 0.35 15 1.00 45 4 1.08 1.11 1.14 1.17 1.25
2NB 050 150 0.5 X R0.250.47 0.35 15 1.50 45 4 1.59 1.64 1.69 1.75 1.87
2NB 050 200 0.5 X R0.250.47 0.35 15 2.00 45 4 2.11 2.18 2.25 2.32 2.49
2NB 050 250 0.5 X R0.250.47 0.35 15 2.50 45 4 2.63 2.71 2.80 2.90 3.11
2NB 050 300 0.5 X R0.250.47 0.35 15 3.00 45 4 3.15 3.25 3.35 3.47 3.73
2NB 050 400 0.5 X R0.250.47 0.35 15 4.00 45 4 4.18 4.32 4.46 4.62 4.98
2NB 050 500 0.5 X R0.250.47 0.35 15 5.00 45 4 5.21 5.39 5.57 5.77 6.22
2NB 050 600 0.5 X R0.250.47 0.35 15 6.00 45 4 6.25 6.46 6.68 6.92 7.46
2NB 050 800 0.5 X R0.250.47 0.35 15 8.00 45 4 8.31 8.59 8.90 9.22 9.95
2NB 050 1000 0.5 X R0.250.47 0.35 15 10.00 45 4 10.38 10.73 11.11 11.52 12.44
2NB 060 100 0.6 X R0.30.57 0.40 15 1.00 45 4 1.08 1.10 1.13 1.16 1.23
2NB 060 200 0.6 X R0.30.57 0.40 15 2.00 45 4 2.11 2.17 2.24 2.31 2.48
2NB 060 250 0.6 X R0.30.57 0.40 15 2.50 45 4 2.63 2.71 2.80 2.89 3.10
2NB 060 300 0.6 X R0.30.57 0.40 15 3.00 45 4 3.14 3.24 3.35 3.46 3.72
2NB 060 350 0.6 X R0.30.57 0.40 15 3.50 45 4 3.66 3.78 3.90 4.04 4.34
2NB 060 400 0.6 X R0.30.57 0.40 15 4.00 45 4 4.18 4.31 4.46 4.61 4.96
2NB 060 450 0.6 X R0.30.57 0.40 15 4.50 45 4 4.69 4.85 5.01 5.19 5.59
2NB 060 500 0.6 X R0.30.57 0.40 15 5.00 45 4 5.21 5.38 5.57 5.76 6.21
2NB 060 550 0.6 X R0.30.57 0.40 15 5.50 45 4 5.73 5.92 6.12 6.34 6.83
2NB 060 600 0.6 X R0.30.57 0.40 15 6.00 45 4 6.24 6.45 6.67 6.91 7.45
2NB 060 800 0.6 X R0.30.57 0.40 15 8.00 45 4 8.31 8.59 8.89 9.21 9.94
2NB 060 1000 0.6 X R0.30.57 0.40 15 10.00 45 4 10.38 10.73 11.11 11.51 12.42
2NB 060 1200 0.6 X R0.30.57 0.40 15 12.00 45 4 12.45 12.87 13.32 13.81 14.91
2NB 070 200 0.7 X R0.350.66 0.45 15 2.00 45 4 2.13 2.19 2.26 2.33 2.49
2NB 070 400 0.7 X R0.350.66 0.45 15 4.00 45 4 4.20 4.33 4.47 4.63 4.98
2NB 070 600 0.7 X R0.350.66 0.45 15 6.00 45 4 6.26 6.47 6.69 6.93 7.46
2NB 070 800 0.7 X R0.350.66 0.45 15 8.00 45 4 8.33 8.61 8.91 9.23 9.95
2NB 080 200 0.8 X R0.40.77 0.50 15 2.00 45 4 2.11 2.17 2.23 2.30 2.45
2NB 080 300 0.8 X R0.40.77 0.50 15 3.00 45 4 3.14 3.24 3.34 3.45 3.70
2NB 080 400 0.8 X R0.40.77 0.50 15 4.00 45 4 4.17 4.31 4.45 4.60 4.94
2NB 080 500 0.8 X R0.40.77 0.50 15 5.00 45 4 5.21 5.38 5.56 5.75 6.18
2NB 080 600 0.8 X R0.40.77 0.50 15 6.00 45 4 6.24 6.45 6.66 6.90 7.43
2NB 080 800 0.8 X R0.40.77 0.50 15 8.00 45 4 8.31 8.58 8.88 9.20 9.91
2NB 080 1000 0.8 X R0.40.77 0.50 15 10.00 45 4 10.38 10.72 11.10 11.50 12.40
2NB 080 1200 0.8 X R0.40.77 0.50 15 12.00 45 4 12.44 12.86 13.31 13.80 14.89
2NB 090 200 0.9X R0.450.85 0.60 15 2.00 45 4 2.14 2.20 2.27 2.33 2.49
2NB 090 400 0.9X R0.450.85 0.60 15 4.00 45 4 4.21 4.34 4.48 4.63 4.97
2NB 090 600 0.9X R0.450.85 0.60 15 6.00 45 4 6.28 6.48 6.70 6.93 7.46
2NB 090 800 0.9X R0.450.85 0.60 15 8.00 45 4 8.35 8.62 8.92 9.23 9.95
2NB 090 1000 0.9X R0.450.85 0.60 15 10.00 45 4 10.41 10.76 11.13 11.53 12.43
2NB 100 200 1.0 X R0.50.95 0.80 15 2.00 45 4 2.14 2.20 2.26 2.33 2.48
2NB 100 300 1.0 X R0.50.95 0.80 15 3.00 45 4 3.18 3.27 3.37 3.48 3.72
2NB 100 400 1.0 X R0.50.95 0.80 15 4.00 45 4 4.21 4.34 4.48 4.63 4.96
2NB 100 400 S6 1.0 X R0.50.95 0.80 15 4.00 50 6 4.21 4.34 4.48 4.63 4.96
2NB 100 500 1.0 X R0.50.95 0.80 15 5.00 45 4 5.24 5.41 5.59 5.78 6.21
2NB 100 600 1.0 X R0.50.95 0.80 15 6.00 45 4 6.28 6.48 6.69 6.93 7.45
2NB 100 600 S6 1.0 X R0.50.95 0.80 15 6.00 50 6 6.28 6.48 6.69 6.93 7.45
2NB 100 800 1.0 X R0.50.95 0.80 15 8.00 45 4 8.34 8.62 8.91 9.23 9.93
2NB 100 800 S6 1.0 X R0.50.95 0.80 15 8.00 50 6 8.34 8.62 8.91 9.23 9.93
2NB 100 1000 1.0 X R0.50.95 0.80 15 10.00 45 4 10.41 10.76 11.13 11.53 12.42
2NB 100 1000 S6 1.0 X R0.50.95 0.80 15 10.00 50 6 10.41 10.76 11.13 11.53 12.42
2NB 100 1200 1.0 X R0.50.95 0.80 15 12.00 45 4 12.48 12.90 13.34 13.83 14.91
2NB 100 1200 S6 1.0 X R0.50.95 0.80 15 12.00 50 6 12.48 12.90 13.34 13.83 14.91
2NB 100 1400 1.0 X R0.50.95 0.80 15 14.00 45 4 14.55 15.04 15.56 16.13 17.39
2NB 100 1600 1.0 X R0.50.95 0.80 15 16.00 50 4 16.61 17.17 17.78 18.43 19.88
2NB 100 1600 S6 1.0 X R0.50.95 0.80 15 16.00 60 6 16.61 17.17 17.78 18.43 19.88
2NB 100 1800 1.0 X R0.50.95 0.80 15 18.00 50 4 18.68 19.31 19.99 20.72 22.37
2NB 100 2000 1.0 X R0.50.95 0.80 15 20.00 50 4 20.75 21.45 22.21 23.02 24.85
2NB 100 2000 S6 1.0 X R0.50.95 0.80 15 20.00 60 6 20.75 21.45 22.21 23.02 24.85
2NB 120 400 1.2 X R0.61.14 1.20 15 4.00 45 4 4.23 4.35 4.49 4.63 4.96
2NB 120 600 1.2 X R0.61.14 1.20 15 6.00 45 4 6.29 6.49 6.70 6.93 7.45
2NB 120 800 1.2 X R0.61.14 1.20 15 8.00 45 4 8.36 8.63 8.92 9.23 9.93
2NB 120 1000 1.2 X R0.61.14 1.20 15 10.00 45 4 10.43 10.77 11.14 11.53 12.42
2NB 120 1200 1.2 X R0.61.14 1.20 15 12.00 45 4 12.49 12.91 13.35 13.83 14.91
2NB 120 1600 1.2 X R0.61.14 1.20 15 16.00 50 4 16.63 17.19 17.79 18.43 19.88
2NB 120 2000 1.2 X R0.61.14 1.20 15 20.00 50 4 20.76 21.47 22.22 23.03 24.85
2NB 150 300 1.5 X R0.751.44 1.35 15 3.00 45 4 3.19 3.27 3.36 3.46 3.68
2NB 150 400 1.5 X R0.751.44 1.35 15 4.00 45 4 4.22 4.34 4.47 4.61 4.92
2NB 150 400 S6 1.5 X R0.751.44 1.35 15 4.00 50 6 4.22 4.34 4.47 4.61 4.92
2NB 150 600 1.5 X R0.751.44 1.35 15 6.00 45 4 6.29 6.48 6.69 6.91 7.41
2NB 150 600 S6 1.5 X R0.751.44 1.35 15 6.00 50 6 6.29 6.48 6.69 6.91 7.41
2NB 150 800 1.5 X R0.751.44 1.35 15 8.00 45 4 8.35 8.62 8.90 9.21 9.90
2NB 150 800 S6 1.5 X R0.751.44 1.35 15 8.00 50 6 8.35 8.62 8.90 9.21 9.90
2NB 150 1000 1.5 X R0.751.44 1.35 15 10.00 45 4 10.42 10.76 11.12 11.51 12.38
2NB 150 1000 S6 1.5 X R0.751.44 1.35 15 10.00 50 6 10.42 10.76 11.12 11.51 12.38
2NB 150 1200 1.5 X R0.751.44 1.35 15 12.00 45 4 12.49 12.90 13.34 13.81 14.87
2NB 150 1200 S6 1.5 X R0.751.44 1.35 15 12.00 50 6 12.49 12.90 13.34 13.81 14.87
2NB 150 1400 1.5 X R0.751.44 1.35 15 14.00 45 4 14.56 15.04 15.55 16.11 17.36
2NB 150 1600 1.5 X R0.751.44 1.35 15 16.00 50 4 16.62 17.18 17.77 18.41 19.84
2NB 150 1600 S6 1.5 X R0.751.44 1.35 15 16.00 60 6 16.62 17.18 17.77 18.41 19.84
2NB 150 2000 1.5 X R0.751.44 1.35 15 20.00 50 4 20.76 21.46 22.20 23.01 free
2NB 150 2000 S6 1.5 X R0.751.44 1.35 15 20.00 60 6 20.76 21.46 22.20 23.01 24.81
2NB 150 2500 1.5 X R0.751.44 1.35 15 25.00 60 4 25.93 26.80 27.75 28.76 free
2NB 150 3000 1.5 X R0.751.44 1.35 15 30.00 70 4 31.10 32.15 33.29 34.51 free
2NB 160 600 1.6 X R0.81.55 1.60 15 6.00 45 4 6.27 6.46 6.66 6.88 7.38
2NB 160 800 1.6 X R0.81.55 1.60 15 8.00 45 4 8.33 8.60 8.88 9.18 9.86
2NB 160 1000 1.6 X R0.81.55 1.60 15 10.00 45 4 10.40 10.74 11.09 11.48 12.35
2NB 160 1200 1.6 X R0.81.55 1.60 15 12.00 45 4 12.47 12.88 13.31 13.78 14.83
2NB 160 1600 1.6 X R0.81.55 1.60 15 16.00 50 4 16.60 17.15 17.74 18.38 19.81
2NB 160 2000 1.6 X R0.81.55 1.60 15 20.00 50 4 20.74 21.43 22.18 22.98 free
2NB 200 400 2.0 X R1.01.92 1.80 15 4.00 45 4 4.25 4.36 4.49 4.62 4.91
2NB 200 500 2.0 X R1.01.92 1.80 15 5.00 45 4 5.28 5.43 5.59 5.77 6.15
2NB 200 600 2.0 X R1.01.92 1.80 15 6.00 45 4 6.32 6.50 6.70 6.92 7.40
2NB 200 600 S6 2.0 X R1.01.92 1.80 15 6.00 50 6 6.32 6.50 6.70 6.92 7.40
2NB 200 800 2.0 X R1.01.92 1.80 15 8.00 45 4 8.38 8.64 8.92 9.22 9.88
2NB 200 800 S6 2.0 X R1.01.92 1.80 15 8.00 50 6 8.38 8.64 8.92 9.22 9.88
2NB 200 1000 2.0 X R1.01.92 1.80 15 10.00 45 4 10.45 10.78 11.14 11.52 12.37
2NB 200 1000 S6 2.0 X R1.01.92 1.80 15 10.00 50 6 10.45 10.78 11.14 11.52 12.37
2NB 200 1200 2.0 X R1.01.92 1.80 15 12.00 45 4 12.52 12.92 13.35 13.82 14.86
2NB 200 1200 S6 2.0 X R1.01.92 1.80 15 12.00 50 6 12.52 12.92 13.35 13.82 14.86
2NB 200 1400 2.0 X R1.01.92 1.80 15 14.00 45 4 14.59 15.06 15.57 16.11 17.34
2NB 200 1600 2.0 X R1.01.92 1.80 15 16.00 50 4 16.65 17.20 17.79 18.41 19.83
2NB 200 1600 S6 2.0 X R1.01.92 1.80 15 16.00 60 6 16.65 17.20 17.79 18.41 19.83
2NB 200 1800 2.0 X R1.01.92 1.80 15 18.00 50 4 18.72 19.34 20.00 20.71 free
2NB 200 2000 2.0 X R1.01.92 1.80 15 20.00 50 4 20.79 21.48 22.22 23.01 free
2NB 200 2000 S6 2.0 X R1.01.92 1.80 15 20.00 60 6 20.79 21.48 22.22 23.01 24.80
2NB 200 2500 2.0 X R1.01.92 1.80 15 25.00 60 4 25.96 26.83 27.76 28.76 free
2NB 200 2500 S6 2.0 X R1.01.92 1.80 15 25.00 60 6 25.96 26.83 27.76 28.76 31.02
2NB 200 3000 2.0 X R1.01.92 1.80 15 30.00 70 4 31.13 32.18 33.30 freefree
2NB 200 3500 2.0 X R1.01.92 1.80 15 35.00 70 4 36.29 37.52 38.84 freefree
2NB 200 4000 2.0 X R1.01.92 1.80 15 40.00 80 4 41.46 42.87 freefreefree
2NB 250 800 2.5 X R1.252.39 2.50 15 8.00 45 4 8.43 8.68 8.95 9.24 9.89
2NB 250 1000 2.5 X R1.252.39 2.50 15 10.00 45 4 10.50 10.82 11.17 11.54 12.38
2NB 250 1200 2.5 X R1.252.39 2.50 15 12.00 45 4 12.57 12.96 13.39 13.84 14.86
2NB 250 1600 2.5 X R1.252.39 2.50 15 16.00 50 4 16.70 17.24 17.82 18.44 free
2NB 250 2000 2.5 X R1.252.39 2.50 15 20.00 50 4 20.84 21.52 22.25 freefree
2NB 250 2500 2.5 X R1.252.39 2.50 15 25.00 60 4 26.01 26.87 27.79 freefree
2NB 300 600 3.0 X R1.52.86 3.00 15 6.00 50 6 6.42 6.59 6.77 6.97 7.41
2NB 300 800 3.0 X R1.52.86 3.00 15 8.00 50 6 8.48 8.73 8.99 9.27 9.90
2NB 300 1000 3.0 X R1.52.86 3.00 15 10.00 50 6 10.55 10.87 11.21 11.57 12.39
2NB 300 1200 3.0 X R1.52.86 3.00 15 12.00 50 6 12.62 13.01 13.42 13.87 14.87
2NB 300 1400 3.0 X R1.52.86 3.00 15 14.00 50 6 14.69 15.15 15.64 16.17 17.36
2NB 300 1600 3.0 X R1.52.86 3.00 15 16.00 60 6 16.75 17.28 17.86 18.47 19.85
2NB 300 1800 3.0 X R1.52.86 3.00 15 18.00 60 6 18.82 19.42 20.07 20.77 22.33
2NB 300 2000 3.0 X R1.52.86 3.00 15 20.00 60 6 20.89 21.56 22.29 23.07 24.82
2NB 300 2500 3.0 X R1.52.86 3.00 15 25.00 60 6 26.06 26.91 27.83 28.82 free
2NB 300 3000 3.0 X R1.52.86 3.00 15 30.00 70 6 31.22 32.26 33.37 34.57 free
2NB 300 3500 3.0 X R1.52.86 3.00 15 35.00 70 6 36.39 37.61 38.91 40.32 free
2NB 300 4000 3.0 X R1.52.86 3.00 15 40.00 80 6 41.56 42.96 44.45 freefree
2NB 300 5000 3.0 X R1.52.86 3.00 15 50.00 100 6 51.90 53.65 55.54 freefree
2NB 350 1500 3.5 X R1.753.35 3.50 15 15.00 60 6 15.73 16.22 16.74 17.30 18.56
2NB 350 2000 3.5 X R1.753.35 3.50 15 20.00 60 6 20.90 21.57 22.28 23.05 24.78
2NB 350 2500 3.5 X R1.753.35 3.50 15 25.00 60 6 26.07 26.91 27.82 28.80 free
2NB 350 3000 3.5 X R1.753.35 3.50 15 30.00 70 6 31.24 32.26 33.37 34.55 free
2NB 350 4000 3.5 X R1.753.35 3.50 15 40.00 80 6 41.57 42.96 44.45 freefree
2NB 400 1000 4.0 X R2.03.80 4.00 15 10.00 50 6 10.65 10.95 11.28 11.62 12.40
2NB 400 1200 4.0 X R2.03.80 4.00 15 12.00 50 6 12.72 13.09 13.49 13.92 14.89
2NB 400 1600 4.0 X R2.03.80 4.00 15 16.00 60 6 16.85 17.37 17.93 18.52 19.86
2NB 400 2000 4.0 X R2.03.80 4.00 15 20.00 60 6 20.99 21.65 22.36 23.12 free
2NB 400 2500 4.0 X R2.03.80 4.00 15 25.00 60 6 26.16 27.00 27.90 28.87 free
2NB 400 3000 4.0 X R2.03.80 4.00 15 30.00 70 6 31.32 32.35 33.44 freefree
2NB 400 3500 4.0 X R2.03.80 4.00 15 35.00 70 6 36.49 37.69 38.98 freefree
2NB 400 4000 4.0 X R2.03.80 4.00 15 40.00 80 6 41.66 43.04 freefreefree
2NB 400 5000 4.0 X R2.03.80 4.00 15 50.00 100 6 52.00 53.74 freefreefree
2NB 600 1500 6.0 X R3.05.70 7.00 -15.00 60 6 freefreefreefreefree
2NB 600 2000 6.0 X R3.05.70 7.00 -20.00 60 6 freefreefreefreefree
2NB 600 3000 6.0 X R3.05.70 7.00 -30.00 110 6 freefreefreefreefree
2NB 800 2000 8.0 X R4.07.60 10.00 -20.00 60 8 freefreefreefreefree
2NB 800 3000 8.0 X R4.07.60 10.00 -30.00 100 8 freefreefreefreefree
2NB 1000 2500 10.0 X R5.09.50 12.00 -25.00 70 10 freefreefreefreefree
2NB 1000 3500 10.0 X R5.09.50 12.00 -35.00 100 10 freefreefreefreefree
2NB 1200 3000 12.0 X R6.011.50 14.00 -30.00 80 12 freefreefreefreefree
2NB 1200 4000 12.0 X R6.011.50 14.00 -40.00 110 12 freefreefreefreefree