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

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

1X 5 PCS One Way no return Check Valve