5 PCS Circulate Plastic Black Red Air Pump Co2 System One Way Non-Return Aquarium Check Valve

Label:Yes Size: As The Shown Material: Plastic Made of durable plastic Color: Black Transparent;Red Transparent The necessary parts for your air pump aquarium O2 system Protect you air pump by preventing aquarium water from back siphoning during a power outage. Price difference quality is huge different for this item quality Great one way check valve for aquarium air pump Compatible with standard aquarium air pipe of 4mm inner diameter Small and easy to install 100% Brand new and high quality

1X 5 PCS One Way no return Check Valve