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

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

1X 5 PCS One Way no return Check Valve