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

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

1X 5 PCS One Way no return Check Valve