About This Fits 3 size: for bpv31 bullet piercing valve 3 in 1 access for air conditioners HVAC, these bullet piercing valves fit 1/4", 5/16" and 3/8" tubing, replace part No. AP4502525, BPV31D, GPV14, GPV31, GPV38, GPV56, MPV31 Quality material: made of zinc alloy, sturdy and corrosion-resistant, It is a high quality replacement part, and won' t wear out or rust over time Easy to use: use a hex key wrench to install this part, requires only 2" clearance for installation and operation Note: to clean the lines before piercing in order to prevent debris from getting into the refrigerant lines What you will get: you will get 4 packs BPV-31 bullet piercing tap valve kits; Each kit including 1 piercing valve, 2 adapters, 1 hex key Overview Material : Zinc Brand : Trounistro Exterior Finish : Zinc Inlet Connection Size : 0.38 Inches Inlet Connection Type : National Pipe Tapered Outlet Connection Type : National Pipe Tapered Number of Ports : 3 Outlet Connection Size : 0.38 Inches Manufacturer : Trounistro UPC : 778942292752