Chrome 1/4" Air Valve x 1/4" Barb (W/ Check Valve)
Chrome Plated Brass Ball / Shut-Off Valves.
These are used for gas lines, distribution manifolds, regulators, etc.
Precise metering adjustments are possible.
Check Valves prevent backflow that might damage equipment.
1/4" MPT x 1/4" Barbed end with Check Valve