Chief AJ Slingbow Slingshot Prime Series - Level 4 - 44# Powerband with Nock String Pouch & D Loop Prime Series Powerbands Prime Series Powerbands are Natural Latex Rubber Tubing made by "Continuous Dip Process Arrow Nock Pouch with D Loop Works with the QuickFire non mechanical release as well as any mechanical release used by archers matched powerband set work with both HFX & Elite Slingbows