Cornelius Keg Beer Line Assembly, Ball Lock, with Plastic Faucet.
Black plastic picnic taps with barb for 1/4 inch ID beer line. Also known as Cobra taps, or hand taps.
Plastic beer faucet cap or cover to protect faucets when not in use. Keeps bugs out of the faucet and collects drips.
1/4" is used in beer lines that are 10-25' in length. It is also used as gas line when you want a really tight fit, particularly with homebrew quick disconnects....