Made of brass, aluminum, and steel materials, offering temperature resistance and durability, providing a solid internal structure, heat resistance, and rust resistance, ensuring long-term service life. The connection parts feature a precision fine thread design, and the interface is equipped with sealing components. The R1234YF to R134A conversion adapter provides reliable sealing performance. It also features a closed design for convenient use and effective leak prevention. These low/high-side adapters allow conversion from 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). Equipped with a lock structure, includes pure copper adapters sealed with O-rings for extended service life, ideal for connecting instruments and use in automotive air conditioning refrigerant charging applications. 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), 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 (32 pieces total). Color: As shown Material: Aluminum Package Contents: 1 set x R134A refrigerant adapter kit Package includes only the items listed above; other items not included. Note: Lighting and display differences may cause slight color variations between the image and actual item. Measurement tolerance: +/- 1-3 cm.