5 PCS Circulate Fish Tank Plastic Air Pump One Way Non-Return Co2 System Aquarium Check Valve

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

1X 5 PCS One Way no return Check Valve