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. The Wishbones is Spectra Cord that provides superior strength and durability. Sling measures 3/8" x 24" (9.5mm x 610mm) and is designed for JBL SHAKA and Travel Pole Spears 2D72C, 2D72C. Sling makes a great Save-A-Dive Kit Item and is covered by a 12 month limited warranty.