Made of brass, aluminum, and steel materials, offering temperature resistance and durability, providing a solid internal structure, heat resistance, long-lasting performance, and rust resistance for extended service life. The connection parts feature a precision fine thread design, with interfaces equipped with sealing components for safety. The R1234YF to R134A conversion adapter ensures reliable sealing. Includes closed functions to prevent leakage and allows convenient operation. These low/high-side adapters convert older 1/4 inch SAE or 7/16 inch-20 UNF R12 and 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 adapters sealed with O-rings for extended lifespan, ideal for connecting various instruments and use in automotive air conditioning refrigerant charging applications. Package includes: 1 pair of R134A high-pressure and low-pressure quick connectors, 1 puncture-type valve, 1 self-sealing tank valve, 1 pair of R134A to R410A/R22 adapter conversion kit, 2 x 1/4 inch male connectors, 1 personal tank adapter (1/2 inch to 1/4 inch female), 1 dual-headed valve core remover, 5 x R410A/R22 valve cores, 5 x R134A valve cores, 5 x green rubber O-rings for R134A, 2 straight R410A accessories, 2 angled R410A adapters – total of 32 pieces. Color: As shown Material: Aluminum Package Contents: 1 set x R134A refrigerant adapter kit Note: Light reflection and different displays may cause slight variations in color between the image and actual item. Measurement allowance is +/- 1-3 cm.