[ Piercing Tap Valve] BPV-31 piercing tap valve, replace part No.: AP4502525, BPV31D, GPV14, GPV31, GPV38, GPV56, MPV31; with 1/4 inch, 5/16 inch, 3/8 inch outside diameter pipes. [Access Service Valve] The Hvac valve with 1/4inch SAE x 1/4inch OD x 3.54inch stem, the core is a poppet valve assisted by a is threaded into the . [Application] you only need a hex key wrench (included) to install this pierce valve; compact design only requires 2 inch clearance area for installation and . These hvac service valves are generally used to have an easy access to the systems for vacuum, charging, pressure checkup and other applications. And the pierce and access service valve also can be used for conditioner refrigerant system. [Material] The piercing valve is made of corrosion-resistant metal won' t wear out or rust over time. The stem is a -contained valve which opens to admit gas to a chamber. Material:Metal colour:Silver + Gold Package Contents: 1 x piercing valves 1 x hex 2 x adapters 5 x access service valves(Rod length 90mm) Only the above package content, other products are not included. Note: Light and different displays may the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.