Plastic Check Valve, 20 Pcs One Way Check Valve, Plastic Water Stops Check Valve for 4mm Hose Non Return Fish Tanks Air Pump Check Valves Aquarium Accessories Blue

• 【Stable Performance】After adding the valve, the air pump can be placed above or below the water surface, there is no danger of water backflowing when the air pump is powered off and stops working, it is an indispensable accessory for the air pump to prevent the water in the fish tank from flowing back into the air pump and burning the air pump to avoid danger.
• 【Wide Range of Use】 When the air pump is placed below the water surface, it can prevent water backflow and damage the former air pump or other products and equipment, the check valve can be used in fish tanks, food and beverage, equipment, chemical industry, very practical.
• 【Product Size】 Set contains 20 check valves, each check valve length is about 3.5cm / 1.4in, for the diameter of 4mm / 0.2in pipe, can repair or extend the standard air hose, simple installation method, safe and reliable, suitable for use in aquarium fish tanks.
• 【Durable Material】The one way check valve is made of high quality plastic material, wear-resistant and durable, durable and stable performance, with strong durable performance, can effectively prevent water from entering the air pump.
• 【High-Quality After-Sales Service】 Your satisfaction is our greatest pursuit, we are committed to providing customers with a pleasant shopping experience and satisfactory after-sales service. If you have any questions, please feel free to contact us. We will give you a satisfactory answer within 24 hours.

Specification: Item Type: Check Valve Material: Plastic Product Color: Blue Suitable for: Inlet/outlet pressure gauge tube 4mm / 0.2in Length: Approx. 3.5cm / 1.4in Package List: 20 x Check Valve Note: 1.Please allow 0-1 inch error due to manual measurement. Thanks for your understanding. 2.Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard.