This is the OMS Performance Mono Wing Donut Style Bladder for BCD/BC Buoyancy Compensator Features: Donut-Style Wing: Allows Easy Movement of Air Side-to-Side Stabilizing Bars Built-In Wing: Reduce Tank Shifting Ideal Wing for Traveling Divers Small, Lightweight and Easy to Pack Inflator Hose: Top Left Location OMS Power Inflator Mechanism 3/8 Threaded Low Pressure Quick-Disconnect Hose Lower Left Overpressure Relief/Pull Dump Valve Lift Capacity: 27 lbs. (12.25 kg) or 32 lbs. (14.5 kg) Outer Bag: 1000-Denier Nylon with Urethane Backing Urethane Backing Protects Against Abrasion and Punctures Inner Bladder: Polyurethane with Ultrasonic Welded Seams Zipper Access to Internal Bladder Interior Backing for Zipper: Provides Protect for Bladder Dual Cylinder Band Slots with Mounting Webbing Reinforcement Dual Stainless-Steel Grommets The Performance Mono Wing is a donut-style wing allowing quick and easy movement of air from one side of the air cell to the other. It also has stabilizing bars built into the wing to reduce tank shifting during the dive. This is the ideal wing for the traveling diver as it is small, lightweight and easy to pack. This donut style configuration wing has the inflator hose at the top left location, comes with the OMS power inflator mechanism with low pressure 3/8" threaded quick-disconnect (QD) hose. The wing is equipped with a lower left overpressure relief/pull dump valve for trimming buoyancy while inverted underwater. "