... do testing of hardness, salt spray test, coating and so on.SPECIFICATION:MATERIAL: LOW CARBON STEEL, C1045 ... , BRASS, ALUMINIUM, AND OTHER MATERIAL REQUIRED BY PRINTS.FINISH: COMMON BLACK ... ZINC YELLOW PLATED, ROHS ZINC PLATED, BLACK OXIDE, HOT DIP GALVANIZED.SIZE: CAN MAKE BY CUSTOMER ... REQUIREMENTS OF MATERIAL, FINISH, HARDNESS, PACKING AND SO ON, PLS GIVE US THE DETAIL OR ...