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

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

1X 5 PCS One Way no return Check Valve