Wide Application: ac access valve are widely used in the refrigerator/air conditioner refrigerant system. The refrigerant access valves are used to charge or dis-charge the refrigerant like R22, R410a or R134a pipe line to the smooth operation of refrigerant system. High Quality: This AC Service Valve are made of brass, compared with other service access valves more and sturdy. Easy to Operate and Install. Service Valve Kit: Ac access valves set comes with 30pcs refrigerator service access valves meet your refrigerant system repair needs. Function: Refrigeration access valves is usually mounted on the outlet of the compressor. It is easy access to the systems for vacuum, charging, pressure checkup and other applications. Access Valves Kit: Air conditioner access valve Thread x OD: 1/4inch SAE x 1/4inch O.D. Length about: 4.7inch(11.9cm), Tube Thickness: 0.027inch(0.7mm)(about)