The Hongsen HS-1221 Access Control Valve is designed for efficient and secure refrigerant system access. Featuring a 1/4" SAE male and 5/16" SAE female connection, it is perfectly suited for newer systems that use 5/16" ports. The valve includes a red hand knob for high-pressure line identification and easy manual operation. Constructed with corrosion-resistant materials, it ensures d... https://www.industrywaala.com/product/hongsen-taa0674-hs-1221-access-control-valve-14sae-male-516sae-female-red-hand-knob