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

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

1X 5 PCS One Way no return Check Valve