1) Material: guardrail chain, used to protect people from danger
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: galvanized, black painted
