This brass valve cap is a main part of the AC service access valve, it contains a rubber seal and provides a sealing function to prevent refrigerant leakage. In addition, it’s used as a valve core remover, allowing you to remove or install the valve core easily and conveniently. Widely used in maintenance or repairing for auto/car air conditioners, household air conditioners, and HVAC systems.SpecificationColor: Brass ToneMaterial: BrassThread Size: Female Flared 1/4 inchSize: 16 x 13mm / 0.63 x 0.51 inch(L*W)Packing List: 50 x Refrigeration Access Valve CapsAdvantageMade of quality, durable material, it offers exceptional reliability and resistance against wear and tear. Its unique design ensures a secure fit and prevents leaks. The AC valve caps are easy to install and maintain, making them a practical and efficient tool for you.