... .diameter: 3-25mm 3.grade: g30 4.automatic machine made hot galvanized link chain1. Material: carbon steel , Q195 , Q2352. OEM is ... A/C , DIN763 , DIN764 , DIN7664. Surface: electrical galvanized , hot galvanized , self color , black painted 5. Grade: g30 , g43 , g806. Packing: gunny bag ...