Pulleys are made of gg22 grey iron per the american standard ansi. The pulleys have high hardness and strengh comparatively. The pulleys are painted after phosphated. So they have excellent function of rust protecting
Case 120*90*90
Racks
The material c45 grade steel. Mould from 1 to 6, ratio include 1:1, 1:2, 1:3, 1:4.
Case 800 kgs 120*90*90
Sprocket
Case 800kgs 120cm*90cm*90cm
