"A" system is commonly referred to as the German Slider because it slides onto the valve face.

SKY-BFPA

The keg coupler connects to the keg valve, "tapping" the keg. Both the gas line from the CO2 tank / regulator and the beer hose to the beer faucet attach to the coupler. Beer Keg Tap Features:

Slide on keg connectionStainless steel probeEasy to engage handle: push down to tap/pull up to untapShort handle ideal for 1/6th barrel kegs and keg with a rubber chimePRV (pressure relief valve)Specifications:

System	A
Products	Warsteiner / Spaten / Paulaner / Hoegaarden
Handle Color	Black
Handle Style	Ergonomic Lever
Gas Port	3/8" O.D. Barb (To fit 5/16" I.D. Gas Hose)
Beer Port	7/8"-14 Thread (U.S. Beer Industry Standard)
Height	5-3/16"

KEG COUPLER