Wellworth Wire Ropes manufactures Webbing Slings/ Round Type Polyester Slings. Wellworth Wire Ropes is a manufacturer of Wire Ropes, Slings, Winches, Chain & Hoists Webbing Slings/ Round Type Polyester Slings consist of an endless load-bearing sling made of polyester fibre, protected from dirt and wear with a single- or double-layered cover of polyester fabric.