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

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

1X 5 PCS One Way no return Check Valve