Suitable for 3 sizes: suitable for bpv31 bullet perforated valve 3 in 1 device, suitable for air conditioner HVAC, these bullet perforated valves are suitable for 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 specification: Model: BPV-31 Port size: 0.64 cm, 1.59 cm, 0.95 cm Colour: black Material: metal Package Contents: 4 x perforated valves 4 x hex wrenches 8 x adapters Note: Clean the line before piercing to prevent debris from entering the refrigerator line Tips: Not suitable for refrigerant 410a. Only the above package content, other products are not included. Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.