1) Material: carbon steel boom chain, alloy steel link chain
2) Standard: Ordinary, NACM84/90, NACM1996/2003, ASTM80, DIN5686A/C, DIN763, DIN764, DIN766, Japanese standard, Australian standard, Kerean standard
3) Grade: G30,G43, G70,G80
4) Surface finish: electro galvanized, hot dip galvanized, self-color, black painted
