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

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

1X 5 PCS One Way no return Check Valve