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

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

1X 5 PCS One Way no return Check Valve