The Vevor 4-way AC manifold gauge set is designed for refrigerant filling and air conditioning system testing in automotive, household air-conditioning, and refrigerator maintenance applications. It is compatible with R134A, R12, R22, and R410A refrigerants and includes four 5' reinforced hoses for versatile servicing. The gauges feature a dry and liquid-filled design with ±1.6% accuracy for dependable readings. Built from brass and aluminum with included adapters, couplers, and service tools, this kit provides a complete setup for charging and evacuation work.