... and colored drawing. 3, material is A3\C45, stainless steel and customer requirement. and ... Machinery transmission sprocket:100B-1-15T,material: C45/A3, surface: chroming, heat treatment, ... .2 Machinery transmission sprocket:16A-18T, material:C45/A3, surface: heat treatment, standard: ISO ... Machinery transmission sprocket: 12A-1-15T, material: C45\A3, surface: zinc plating, heat treatment, standard ...