- High-quality material: Our R134a to R1234YF adapter is made of brass and undergoes rigorous testing to withstand high temperatures. This construction provides robust, long-lasting performance without compromising quality. - R1234YF low-side set with complete fittings: Includes red high-pressure R1234YF to R134A adapter and blue low-pressure R1234YF quick coupling. Also includes 1/4" SAE female x high-pressure, 16 mm R134A quick coupling, and 1/4" SAE female x low-pressure 13 mm R134A quick coupling. - Adjustable valve: The adapters feature adjustable valves for easy, leak-free installation and disassembly. This design promotes reliable operation and reduces the risk of leakage over time. - Easy installation: Rubber seals and deep, precise threads prevent leakage and enhance sealing performance. The setup is simple to install and remove, and convenient to mount on your vehicle's air conditioner system. - Practical applications: Ideal for servicing vehicles that use R134a or R1234YF refrigerants, converting between refrigerant types during maintenance, and field top-offs or pressure checks where compatibility with both high and low sides is required.