... 3.grade: g30 4.automatic machine made steel link chain with blue zinc plated1. Material: carbon steel , ... , Q2352. OEM is welcome3. Standard: DIN5685 A/C , DIN763 , DIN764 , DIN7664. Surface: electrical galvanized , hot galvanized , ... , 8 , 8.5 , 9 , 10 , 11 , 12 ,1312. Din766 link chain: 2, 3 , 4 , 5 , 6 , 7 , 8 , 9 ... , 20 , 22 , 23 , 26 ,28 , 30 , 3213. Din763 link chain: 2, 2.5 , 3 , 3.5 , 4 , 4.5 ...