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

Label:Yes Small and easy to install Made of durable plastic 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 The necessary parts for your air pump aquarium O2 system Material: Plastic Size: As The Shown 100% Brand new and high quality Price difference quality is huge different for this item quality 1X 5 PCS One Way no return Check Valve