General description Made of brass, aluminum, and steel, this AC R134A Adapter Quick Coupler Kit is designed for air conditioning refrigeration systems. It offers excellent temperature and corrosion resistance, ensuring a solid internal structure, heat resistance, durability, and rust resistance for long-term service life. The precision fine thread design of the connection parts, along with sealing components, enhances safety and prevents leakage during use. Technical specifications Material: Brass, aluminum, steel Low side connection: 1/4 inches (7/16 inches-20) x 13 mm (blue) High side connection: 1/4 inches (7/16 inches-20) x 16 mm (red) Measurement allowed error: +/- 1-3 cm Compatibility and accessories Converts old 1/4 inch SAE or 7/16 inch-20 UNF R12/R22 charging ports to accept R134A fast disconnecting hose Includes 1 pair of R134A high-voltage and low-voltage fast connections 1 x puncture type water faucet 1 x self-sealed tank water faucet valve 1 pair of R134A to R410/R22