Feature: 1. Medical Grade Material: The check valve is made of medical grade material, safe and nontoxic, with strong resistance to acid, alkali and salt corrosion. 2. Fine Craftsmanship: The check valve is finely crafted and has high adsorption properties, thermal stability, chemical stability, high mechanical strength, etc. 3. Easy to Carry: This check valve is small and light, easy to carry and store, easy to use, excellent performance and long life. 4. Functional Description: This 3/8inch check valve is used in fluid systems to prevent the backflow of fluids or in pneumatic systems to prevent the backflow of compressed air, the check valve can be used in a temperature range of -20℃ to 70℃. 5. Wide Application: The check valve can be used in water treatment, air purification, automotive parts, mechanical industry, household appliances, etc. to effectively prevent backflow of media. Specification: Item Type: Check Valve Material: Plastic and Rubber Model: CDPV6 Interface Diameter: Approx. 7 ~ 10mm / 0.28 ~ 0.39in Overall Length: Approx. 43mm / 1.69in Opening Pressure: ≤2kpa Maximum Back Pressure: 200kpa. Package List: 6 x Check Valve Note: When installing the check valve, special attention should be paid to the direction of flow of the medium. The normal flow direction of the medium should be the same as the direction of the arrow indicated on the valve body, otherwise the normal flow of the medium will be cut off.