AC pros and serious DIYers, this Robinair hose set is built for the job. You get three 60-inch color-coded hoses (red, yellow, blue) specifically designed for R-134a refrigerant. They meet strict low-permeation standards, meaning less refrigerant escapes through the hose walls. Built tough with a 740 PSI working pressure and a 3700 PSI burst pressure, they can handle high-pressure systems like R-410a too. Each hose has a convenient in-line ball valve that lets you control refrigerant flow with a simple quarter-turn. The coupler nuts are deeply knurled for easy finger-tightening, and a strong crimp ensures a reliable seal. If you need durable, dependable hoses for your manifold gauge set that will last for years, this Enviro-Guard set from the trusted Robinair brand is the way to go.