COMPLETE GAUGE SET: This professional automotive AC tool kit includes a 3-way gauge, 3 color-coded hoses, 2 adjustable 1/4inch quick couplers, a 1/4inch to 1/2inch SAE adapter, and a puncture-style can tap; enjoy hassle-free setup and easy operation as you nip your HVAC problems in the bud HYBRID ANTISHOCK GAUGES: The 2.6inch high and low pressure gauges combine the best features of dry and liquid-filled designs, with an oil-filled core resisting wear and shock and a dry dial providing better winter performance; the moisture indicator monitors your coolant's condition in real time; and calibration screws and superior design provide 1.6% tolerance accuracy COLOR-CODED HOSES: Blue for low, red for high, and yellow for charging, these PVC hoses have 4 reinforced layers to work with daily pressure up to 600 psi ( pressure: 3000 psi) WIDE APPLICATION: This car AC gauge set works with R134a, R12, R22, and R502 refrigerants; ideal for both DIY and professional HVAC maintenance, it allows you to measure your system's pressure, evacuate and refill coolant, and more; a heavy-duty blow-molded carrying case comes included for easy storage and port between jobs Name:AC Manifold Gauge Set Type:Manifold pressure gauge Type:AC Gauges compatible:R134a R12 R22 R502, 3 Way Automotive AC Gauge Set Color: As Shown Material: Plastic, Metal Package Contents: 1set x Electric pressure gauge Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.