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

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

1X 5 PCS One Way no return Check Valve