1.material:carbon steel ,alloy steel, 2.high strength, high temperature-proof ,durable 3.easy to install,heavy load 1.material:carbon steel ,alloy steel, 2.high strength, high temperature-proof ,durable 3.easy to install,heavy load W.L.L.(ton)I.L.I.D.OF EYEN.W.CARBON STEELALLOY STEELinchinchlbs1/23/42.80.630.353/413.220.750.5511-1/23.660.910.751-1/224.091.121.25234.691.251.734-1/25.781.563.6577. ...