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

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

1X 5 PCS One Way no return Check Valve