5 PCS Durable Fish Tank Plastic Aquarium Check Valve Air Pump Co2 System One Way Non-Return

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

1X 5 PCS One Way no return Check Valve