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

Label:Yes Price difference quality is huge different for this item quality Material: Plastic 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 100% Brand new and high quality Small and easy to install Made of durable plastic Color: Black Transparent;Red Transparent Size: As The Shown Great one way check valve for aquarium air pump The necessary parts for your air pump aquarium O2 system

1X 5 PCS One Way no return Check Valve