The female part is similar to the ends of the standard inflation hoses, but with much robustness and much more gas flow, the needed for a great diver demand. It has a screw dial part that allows us to block the connection, while blocked it has not possible to disconnect. The hose connection is male 9/16 " (standard regulator hose)
The male part has a non-return valve that only allows the gas to flow in one direction. The hose connection is male 9/16