... capacity 0.5T-30T high factor of safety 4.HS-C CHAIN BLOCK,HS-Z CHAIN BLOCK,CHAIN BLOCK,CHAIN HOISTcertificate ISO9001 ... ,GS,CE,TUVwe can make HS-C,HS-Z,HS-VTcapacity 0.5T-30Thigh factor of safety Chain block ... and side plates for good quality9) The static test is 4 times of capacity,and running test is 1.5 times ... extralift KGS1.71.72.35.33.77.959.718.8 4.HS-Z orange block