[PREMIUM MATERIAL] Made of high-quality metal with excellent rust-resistant and anti-leaking performance. The hose is constructed from rubber, offering good pressure resistance and safe operation. Both components are made of corrosion-resistant metal that resists wear and rust over time, featuring an anti-leaking design for added safety. [PIERCING VALVE KITS] BPV-31 Refrigerator Tap Valve compatible with 1/4 inch, 5/16 inch, and 3/8 inch outside diameter pipes. Replaces AP4502525, BPV31D, GPV14, GPV31, GPV38, GPV56, MPV31. A practical and convenient kit for use. Each kit includes 1 piercing valve, 1 hex key, and 2 adapters. [RH R134A SELF-SEALING ADAPTER] The R134a self-sealing adapter allows connection to refrigerator charging hoses and is compatible with R134a self-sealing cans. Male end connects to the R134a can tap; female end connects to self-sealing cans. [REFRIGERATOR FREON RECHARGE HOSE WITH GAUGE] One side of the refrigerant charging hose features a piercing R134a can tap for direct connection to puncture refrigerant cans. The other side has a 1/4 SAE female port to connect to the refrigerator's male port. The color-coded dial includes gauge readings for R134, R12, and R22 as indicated on the gauge. [WIDELY APPLICATION] This recharge refrigerator kit is commonly used for home air conditioning and refrigeration systems using R-134a, R-12, or R-22 refrigerants. With the R134a self-sealing adapter, this kit is compatible with both piercing R134a cans and self-sealing cans, meeting a wide range of service needs. Color: Blue + Silver Material: Rubber + Metal Package Contents: 1 x R134a Freon Recharge Hose with Gauge 2 x BPV-31 Piercing Tap Valve 1 x RH R134a Self-Sealing Adapter Note: Light and display differences may cause slight variations between the item color in the image and actual product. Measurement error allowed is +/- 1-3 cm.