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

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

1X 5 PCS One Way no return Check Valve