This is the XS Scuba Oceanic Style QD Adapter Features: Convert any standard regulator hose to a Oceanic Style" QD hose Installs to the second stage end of a regulator hose Chromed brass construction with Viton o-rings Low pressure use only - below 200 psi Compatible with: Oceanic Air XS, Aeris Air Link, Zeagle Octo Plus, Beauchat Venturi and the Swedish CEJN couplers as found on many drysuit inflator valves e.g. SiTech XS Scuba's EZ" QD Adapters allow you to convert any standard regulator hose to an Oceanic Style" QD Hose. EZ" QD Adapter is a must item for your save-a-dive kit and can quickly save an expensive dive vacation problem. "