... ,alloy steel Weight:0.1kg to 5kgs Certificate:ISO9001 scaffolding couplersMaterial:Cast iron,carbon steel,alloy steelWeight:0.1kg ... CNF&CIF named seaport of destination, about usAs a professional fastener & hardware supplier in China, Dalian Leading Metal Ltd. ... specialize in component fastener field includes nuts, bolts, washers, screws,pins, rivets, ...