A. Specifications of Thickness and Width:
thickness width
BWG inch mm inch mm
18 0.049 1.24  19.0 22.2 25.4 28.6 31.8 34.9 38.1 41.3 44.4 47.7 50.8
19 0.042 1.07  19.0 22.2 25.4 28.6 31.8 34.9 38.1
20 0.035 0.89  19.0 22.2 25.4 28.6 31.8 34.9 38.1
21 0.032 0.81  15.9 19.0 22.2 25.4
22 0.028 0.71  15.9 19.0 22.2 25.4
23 0.025 0.64  12.7 15.9 19.0
24 0.022 0.56  12.7 15.9 19.0
25 0.020 0.51  12.7 15.9
26 0.018 0.46  12.7 15.9
27 0.016 0.41  12.7 15.9
28 0.014 0.36  12.7 15.9
29 0.013 0.33  12.7 15.9
30 0.012 0.30  12.7 15.9
31 0.010 0.25  12.7 15.9
32 0.009 0.23  12.7 15.9
33 0.008 0.20  12.7 15.9
Note: Outside of the above mentioned specifications also can be produced according to clent's orders.

B. Tolerance of Thickness & Width:
thickness（H） tolerance of thickness tolerance of width
H＜0.25 ±0.02 -0.30
0.25～0.40 ±0.02 -0.30
0.40～0.60 ±0.03 -0.30
0.60～0.80 ±0.04 -0.40
0.80～1.00 ±0.05 -0.40
1.00～1.24 ±0.06 -0.40

C. Mechanics Property of Steel Strips:
 tensile strengty extensibility
Nf/mm2 not less than
1 280～420 25
2 380～500 10
3 > 500 5
4 > 700 3
5 > 800 8
6 > 1000 12

D. Sheet Type (1) irregular rate ≤3mm (2) bending ≤3mm/m

E. Surface: Blue treatment by electric furnace.

F. Package: The blue packing strips are coated by antirust grease and are packed by oilpaper and gunny cloth. Each roll is about 15kg grams in one strip, and three rolls are bundled up in one bundle. Each tray contains about one metric tons of bundless' steel strips.