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

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

1X 5 PCS One Way no return Check Valve