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 Sling for JBL D72, D60 and D48 Pole Spears and has a Non-Corrosive Plastic Retainer. Sling measures 5/16" x 34" (8mm x 864mm). Sling makes a great Save-A-Dive Kit Item and is covered by a 12 month limited warranty.