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

Label:Yes Great one way check valve for aquarium air pump Price difference quality is huge different for this item quality 100% Brand new and high quality The necessary parts for your air pump aquarium O2 system Made of durable plastic Material: Plastic Color: Black Transparent;Red Transparent Small and easy to install 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. Size: As The Shown

1X 5 PCS One Way no return Check Valve