1.Light, soft, high safety factor, long life, 2.non-conductive, no risk ... resistance A flat sling webbing sling: Material: 100% polyester high tenacity polyester industrial yarn Safety factor: 6:1, 7:1 ... Two, rounded sling (cable) Round sling: Material: 100% polyester high tenacity polyester industrial yarn Safety factor: 6:1, 7:1 ... in contact us, we always welcome your to consultation. lifting straps