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

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

1X 5 PCS One Way no return Check Valve