Suitable for BPV31 perforated valve 3 in 1 device, compatible with air conditioner HVAC systems. These perforated valves fit 1/4 inch, 5/16 inch, and 3/8 inch tubes. Replacement part numbers: AP4502525, BPV31D, GPV14, GPV31, GPV38, GPV56, MPV31. Quality material: Made of zinc alloy, strong, anti-corrosion, high-quality replacement parts, durable, no rust. Easy to use: Use a hexagon wrench to install this part; only 5.08 cm clearance is required for installation and operation. Color: Silver Material: Metal Package Contents: 10 x BPV-31 piercing tap valve kits Only the above package content is included; other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture to vary slightly from the real thing. Measurement allowed error is +/- 1-3 cm.