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

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

1X 5 PCS One Way no return Check Valve