supply of set of heavy duty polyester , set of heavy duty polyester sling as per is 15041-2001 bsen.1492-2:2001 and safe ty factor- 7:1. 1) polyster round endless sling of capacity 3 ton x 4 mtr. circumferential le ngth (2 mtr effective length) qty = 40 nos. 2) polyster round endless sling of capacity 4 to n x 4 mtr circumferential length (2 mtr effective length) qty = 40 nos. 3) polyster web sling of capacity 6 ton x 4 mtr effective length. qty = 40 nos. one set consists of 3 items in 120 no s. test certificate for each sling to be provided from govt. approved competent authority [ warranty period: 30 months after the date of delivery ] ]