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. "