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

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

1X 5 PCS One Way no return Check Valve