German Sanke Coupler (M-Type)
M-Type Keg Couplers are very prominent for both German and Polish breweries, and many German kegs that you get, such as Schneider and Einbecker. This coupler type is also commonly known as the 'Small Pin German Slide' type keg tap dispense coupler.
It is very similar to the A-Type Coupler, but with a different probe. Features a chrome plated brass body and stainless steel probe.