... . We can 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 POWDER COATING, ... AND SO ON, PLS GIVE US THE DETAIL OR PRINTS. HOPING WE CAN HAVE THE CHANCE TO WORK WITH YOU. metal pins and ...