Fastener 1.Material:Cast iron,carbon steel 2.Weight:0.05 to 2kgs 3.Surface ... other 4.Certificate: ISO9001 Construction Fastener 1. Material: Gray iron & ductile iron & malleable iron according to ASTM, DIN,JIS, EN, ISO, GB standards ... you with excellent quality, competitive price and on-time delivery. Cast iron Fastener