COMPLETE GAUGE SET - This automotive AC tool kit features a comprehensive 4-way gauge, four color-coded hoses, two adjustable 1/4" quick couplers, and a variety of adapters: 1/2" to 1/4" Acme, 1/4" to 5/16", and 5/16" to 1/4". Also included is a puncture-style can tap for added convenience. HYBRID ANTISHOCK GAUGES - The 2.6" high and low pressure gauges utilize both liquid-filled and dry designs. The oil-filled core offers excellent resistance to wear and shock, while the dry dial ensures optimal performance even in winter conditions. BUILT TO LAST - Constructed from durable brass, ABS, and rubber, this AC manifold gauge set is built for reliable, heavy-duty use. The moisture indicator helps monitor the condition of your coolant in real time, and calibration screws ensure accuracy within 1.6%. COLOR-CODED HOSES - The PVC hoses are color-coded: blue for low pressure, red for high pressure, yellow for charging, and black for evacuation. With a robust four-layer design, these hoses can handle pressures up to 800 psi and burst pressures of 4000 psi. USE SCENARIOS - Ideal for automotive technicians performing routine AC maintenance or repairs. - Suitable for DIY enthusiasts needing precise coolant management during vehicle service. - Perfect for HVAC professionals calibrating and servicing air conditioning systems in residential or commercial settings.