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

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

1X 5 PCS One Way no return Check Valve