JBL's unique latex formulation and dip manufacturing process delivers radical modulus strength. The power curve increases as bands are stretched for optimum performance. Special anti-oxidants help protect against harmful U.V. rays, prolonging sling life. Wishbones are 302 stainless wires that provide superior strength and durability, 11/16" x 24 (17.5mm x 610mm). Sling is for 4D22L Lightning Spear Gun. Sling makes a great Save-A-Dive Kit Item and is covered by a 12 month limited warranty.