Made of brass, aluminum, and steel materials, offering temperature resistance and durability, providing a solid internal structure, heat resistance, durability, and rust resistance, ensuring long-term service life. The connection parts adopt a precision fine thread design, and the interface is equipped with sealing components. The R1234YF to R134A conversion adapter design provides good sealing performance. It also features a closed design for convenient use and effective leakage prevention. These low/high-side adapters convert older 1/4 inch SAE or 7/16 inch-20 UNF R12 R22 charging ports to accept R134A quick disconnect hoses; low side: 1/4 inch (7/16 inch-20) x 13 mm (blue); high side: 1/4 inch (7/16 inch-20) x 16 mm (red). Features a locking structure, includes pure copper adapter, sealed with O-ring for extended service life, ideal for connecting instruments and use in automotive air conditioning refrigerant charging applications. Package includes: 1 pair of R134A high and low pressure quick connectors, 1 x piercing-type valve, 1 x self-sealing tank valve, 1 pair of R134A to R410A/R22 adapter conversion kit, 2 x 1/4 inch male connectors, 1 x personal tank adapter (1/2 inch to 1/4 inch female connector), 1 x dual-headed valve core remover, 5 x R410A/R22 valve cores, 5 x R134A valve cores, 5 x R134A green rubber O-rings, 2 x R410A straight adapters, 2 x R410A angle adapters, total of 32 pieces. Color: As shown Material: Aluminum Package Contents: 1 set x R134A refrigerant adapter kit Only the above package content is included; other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture to differ slightly from the actual product. Measurement allowance is +/- 1-3 cm.