Having spare parts for your gun or sling is the only way to assure you won't get skunked on a spear fishing trip. 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 Breakdown Pole Spears (JBL2D72 and JBL2D80) has a non-corrosive plastic threaded screw retainer to fasten sling to pole. Sling measures 3/8" x 32" (9.5mm x 813mm). Sling makes a great save-a-dive-kit Item.