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This complete diagnostic R134A, R410A, and R22 gauge set for use on air condition systems features easy to read gauges that have extra-large faces that display temperature in Fahrenheit and give R410, R22, and R134a readings. Each of the three color coded hoses measures 5 feet long and have 1/4" knurled fittings. Another black hose, measures 5 feet long and has a 5/8" fitting. The Freon charging hoses have a maximum working pressure of 800PSI and a burst pressure of 4000PSI. Also included are a pair of quick disconnect couplers for high/low fittings. Each coupler has a shut off valve to prevent loss of refrigerant. There's also an acme adapter for R134A (1/4" male to 1/2" female). Aluminum housing makes the set durable and accurate time after time.