... requirement, the safety factor of sling has 4:1,5:1,6:1,7:1,8:1, its load range is from 0.5t to ... .03.05.08.010.0Double-sling(450))1.42.84.27.011.214.0double-sling(900))1.02.03.05.08.010.0triple ... -sling(450))1.53.04.57.512.015.0quadruple ... -sling(450))2.04.06.010.016.020.0 ...