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

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

1X 5 PCS One Way no return Check Valve