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

Label:Yes Protect you air pump by preventing aquarium water from back siphoning during a power outage. Color: Black Transparent;Red Transparent Material: Plastic Small and easy to install 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 Made of durable plastic Compatible with standard aquarium air pipe of 4mm inner diameter 100% Brand new and high quality Size: As The Shown

1X 5 PCS One Way no return Check Valve