... carbon steel galvanization silk. Outside diameter: 4 inches, 6 inches, 8 inches, 10 inches, 12 inches, etc. (20mm - 1000mm) Slot: 0 ... : 2.2x 3.0 mm, 2.3 * 3.0 mm, 3.0 * 4.6 mm, 3.0 * 5.0 mm, etc The specification: torre 3.8 mm ... , reflexed, etc.). II, features: 1. The section for screening all the trapezoid. Wedge graphics width values dimension a 1.3, 160, 180, 2.0 ...