[WIDE COMPATIBLITY] -- The high & low quick couplers adapters are suitable for R1234yf refrigerants, AC manifold gauge, diagnostic check, recovery and evacuation work. [EASY INSTALLATION] -- Brass metal construction for quick and easy to install, red for high pressure, blue for low pressure, include 2 pcs removable brass adapter (1/4" SAE Male Port). [SAFETY& DURABLE] -- Extended disconnect protection sleeve provides safety protection and protect from injury and refrigerant loss, defending against leakage. Hard construction make sure that durable and long lasting to use. [PREMIUM QUALITY] -- The heavy duty low loss refrigerant manual couplers are made of brass mental material, pass a strict inspection to ensure high quality and premium performance. [WHAT YOU GET] -- A set of R1234yf High/Low Quick Couplers. If you have any question, we will try our best to help you ensure a fast and effortless ac replacement process.【Note】This Product is R1234yf Quick Couplers, Please ignore Misprints on Product Packaging, Weight: 0.220462262 pounds, Manufacturer: Aupoko