The Dual Inner Bladder/Dual Inflator Extreme Wing for Doubles. Both inflator elbows are on the rear of the wing with equal length hoses. K-Type inflators. Having both inflator elbows on the rear of the wings keeps the one elbow from digging into the rear of the divers shoulder and allows easier access to the back up inflator hose. Puncture and abrasion protection is provided by the tiny, hard guard plates that are adhered to conventional and non-conventional base fabrics. Because the gap between guard plates is very small, it provides high levels of protection from sharp pointed objects and abrasion.