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

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

1X 5 PCS One Way no return Check Valve