- COMPLETE GAUGE SET: This automotive AC tool kit features a comprehensive 4-way gauge system, including four color-coded hoses, two adjustable 1/4'' quick couplers, and multiple adapters (1/2'' to 1/4'', 1/4'' to 5/16'', and 5/16'' to 1/4''). It also includes a puncture-style can tap for added convenience. - HYBRID ANTISHOCK GAUGES: The 2.6" high and low pressure gauges utilize a hybrid design, combining the durability of an oil-filled core with a dry dial for optimal winter performance. This ensures resistance to wear and shock, making it reliable in various conditions. - BUILT TO LAST: Constructed from solid brass, ABS, and rubber, this AC manifold gauge set is engineered for long-lasting, heavy-duty use. The built-in moisture indicator provides real-time monitoring of your coolant's condition, while calibration screws guarantee 1.6% accuracy. - COLOR-CODED HOSES: The kit includes four PVC hoses—blue for low pressure, red for high pressure, yellow for charging, and black for evacuation. These hoses are designed with four layers to safely handle pressures up to 800 psi, with a burst pressure of 4000 psi. - USE SCENARIOS: Ideal for professional mechanics and DIY enthusiasts, this tool kit is perfect for servicing automotive air conditioning systems, diagnosing AC issues, and efficiently charging refrigerants. Whether you're performing routine maintenance or dealing with a refrigerant leak, this complete set provides the necessary tools for effective repairs.