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

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

1X 5 PCS One Way no return Check Valve