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

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

1X 5 PCS One Way no return Check Valve