1. Made of metal with rust-resistant and anti-leaking performance. The hose is made of rubber, featuring good pressure resistance and safe to use. Both components of the kit are made of corrosion-resistant metal that resists wear and rust over time, and the anti-leaking design enhances safety during use. 2. PIERCING VALVE KITS: BPV-31 Refrigerator Tap Valve compatible with 1/4 Inch, 5/16 Inch, 3/8 Inch Outside Diameter Pipes, replaceable for AP4502525, BPV31D, GPV14, GPV31, GPV38, GPV56, MPV31. A practical and convenient kit, each including 1 piercing valve, 1 hex key, and 2 adapters. 3. RH R134a Self-Sealing Adapter: Through the R134a self-sealing adapter, the R134a can tap off the refrigerator charging hose, which is compatible with R134a self-sealing cans. The male end connects the R134a can tap, and the female end connects self-sealing cans. 4. REFRIGERATOR FREON RECHARGE HOSE WITH GAUGE: One side of the refrigerant charging hose is a piercing R134a can tap for direct connection to puncture refrigerant cans, and the other side is a 1/4 SAE female port to connect the refrigerator male port. The colored dials with unit gauge have scale readings for R134/R12/R22 as shown on the gauge. 5. WIDELY APPLICATION: This recharge refrigerator kit is typically used for home refrigerant systems with R-134a, R-12, and R-22 types of freon. With the R134a self-sealing adapter, this refrigerator freon recharge kit is compatible with not only piercing R134a cans but also self-sealing cans, aiming to meet various needs as much as possible. 6. Colour: blue+silver 7. Material: rubber+metal 8. Package Contents: 1 * R134a freon recharge hose with gauge; 2 * BPV-31 piercing tap valve; 1 * RH R134a self-sealing adapter. Only the above package content is included; other products are not included. 9. Note: Light and different displays may cause the color of the item in the picture to differ slightly from the real thing. The measurement allowed error is +/- 1-3cm.