Made of brass, aluminum, and steel materials, offering temperature resistance and durability, providing a solid internal structure, heat resistance, longevity, and rust resistance for long-term 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 performance. Includes closed functions 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). Features a locking structure, includes pure copper adapters with O-ring seals for extended service life, ideal for connecting various instruments and used in automotive air conditioning refrigerant charging applications. Package includes: 1 pair of R134A high and low pressure quick connectors, 1 x piercing 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 green rubber O-rings for R134A, 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 items are not part of the package. Note: Lighting reflections and differences in display screens may cause slight variations in color between the image and the actual item. Measurement allows an error of +/- 1-3 cm.