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

Label:Yes Color: Black Transparent;Red Transparent Size: As The Shown Great one way check valve for aquarium air pump Small and easy to install Made of durable plastic 100% Brand new and high quality 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. Compatible with standard aquarium air pipe of 4mm inner diameter Price difference quality is huge different for this item quality Material: Plastic

1X 5 PCS One Way no return Check Valve