Usage Tips:The R134A AC refrigerant charge hose kit with gauge is suitable for both domestic refrigeration and automotive R134A systems. The cap tap is also compatible with both the R134a puncture type and the R134a self-sealing type. An R134a puncture tap for direct connection to the puncture refrigerant canister is fitted to one end of the hose. The other end is fitted with a 1/4 SAE female fitting to connect to the fridge's male fitting. Coloured gauge with Fahrenheit and R134a scaled readings. BPV-31 Poppet Tap Valve, compatible with 1/4inch, 5/16inch, 3/8inch O.D. pipe. Interchangeable Part Numbers: AP4502525, BPV31D, GPV14, GPV31, GPV38, GPV56, MPV31. Constructed of metal for durability and resistance, this is a convenient replacement part. To connect the AC refrigerant charging hose to the self-sealing refrigerant tank, use the R134a self-sealing adapter with RH thread. The R134A AC charge hose kit work with the puncture type refrigerant canister if this adapter is removed. Colour:blue Material:Metal Package Contents: 1 x ACR134A Refrigerator Freon Recharge Kit Only the above package content, other products are not included. Note: Light reflection 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.