American Sanke Coupler "D" with pull lever. This is the most common system available in the US. It is used by all the major and Craft breweries.
The keg coupler connects to the keg. Both the gas line from the CO2 tank / regulator and the beer hose to the beer faucet will attach to the coupler. Comes with a 5/16" barb for the Co2 connection
Sanke does not include the tail piece, washer and beer nut for attaching beer line, we recommend using an MFL tailpiece with Swivel Nut so you can move between your homebrew and commercial system.