Professional 4-Way air conditioning diagnostic manifold gauge set for R134A, R410A and R22 refrigerants. Designed for AC charging, diagnostic check, recovery and evacuation work. Include 4pc 5FT extra long freon charging hose, 4 color for easily recognition, red for high pressure, blue for low pressure, yellow for refrigerant bottle, black for vacuum pump. Blue Gauge (low): 0-550 PSI ___ Red Gauge (high): 0-750 PSI ___ Burst pressure: 4000PSI ___ Max working pressure: 800PSI ___ Fahrenheit degree unit with easy to read instrument panel. Made from solid bass + aluminum + PVC + plastic, stands up to heavy use and accidental drops, ideal for professional auto mechanics. Include a detailed parts diagram and step by step instructions to help novice. You will get: 1pc 4-way gauge (1/4" male) ___ 4pc hoses (1/4" female) ___ 2pc adjustable couplers (1/4" male) ___ 1pc adjustable can tap (1/4" male) ___ 1pc valve core wrench ___ 3pc ACME & tank adapter ( male to female >> 1/4" to 1/2" + 5/16" to 1/4" + 1/4" to 5/16") ___ 1pc custom modeled case ___ 1pc detailed user manual.