... .Safety factor: 4:1,5:1, 6:1,7:1,8:1 3.Standard:ISO 4878,EN1492-1,JB/T 8521 ... sling with metal. There are 5 types of eye formation: Flat eye, Reversed eye, Folded eye 1/2 width from side ... and Four layers. The safety factors from 5:1 to 8:1 and WLL (Working Load Limited) from 1t to 50t ... many other countries.PLYOne plyTwo plyThree plyFour plyWLL(t)2468 Flat Webbing Sling (4 ton)