20Pcs Fish Tanks Air Pump Unidirectional Check Valve Supplies Aquarium Accessories Blue

Feature: 1. Made of high-quality plastic materials, with good durability and stability. 2. It can prevent the water in the fish tanks from flowing back into the air pump and is an indispensable accessory of the air pump. 3. The installation method is simple, safe and reliable, suitable for use in aquarium fish tanks. 4. When the air pump is placed below water surface, can prevent water from flowing back and damage front air pump or other product equipment. 5. After adding the valve, the air pump can be placed above the water surface or below, there will never be a danger of water backflow when the air pump is powered off and stops working. Specification: Condition: 100percent Brand New Item Type: Check Valve Material: Plastic Product Color: Blue Suitable for: Inlet/outlet pressure gauge tube 4mm / 0.2in Function: Used as an oxygenation pump due to the pressure difference between the inside and outside when the work stops suddenly, causing the water flowing to reverse, damaging the oxygenation pump and causing the water in the cylinder to overflow to form a property loss. It is an indispensable accessory of the air pump to prevent the water in the fish tanks from flowing back into the air pump and burning the air pump to avoid danger. Product Size: 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.