... manufacturer 2.diameter: 3-25mm 3.grade: g30 4.automatic machine made steel link chain with blue zinc ... DIN763 , DIN764 , DIN7664. Surface: electrical galvanized , hot galvanized , white-blue zinc plated , self color , 5. Grade: g30 , g43 , g806. ... /8 , 111. Din5685 A/C short/long link chain: 2 ,2.5 , 3 , 3.5 , 4 , 4.5 ... , 23 , 26 ,28 , 30 , 3213. Din763 link chain: 2, 2.5 , 3 , 3.5 , 4 , 4.5 , 5 , ...