Check Valve 5Pcs Clear Red Aquarium Airline Plastic One Way Non-Return Flap

Specification: Product name: one-way check valve Material: environmentally friendly ABS Color: transparent red Caliber: 8mm/0.31inch Length: 55mm/2.17inch Package contains: 5PCS one-way check valve Feature: Made of high-quality materials easy to hide durable not easy to age and long service life. The one-way check valve prevents the water in the aquarium from forming backflow and damaging the air pump during power outages. Easy to install plug and play 8mm one-way check valve can be used for most aquarium air pumps. Used for fish tank air pump it can provide effective protection for your air pump and can be used with fish tank for a long time. Note: Do not use them with CO2 systems. These check valves are only suitable for ordinary aquarium air pumps.