10pcs/lot Plastic One Way Check Valve for Aquarium Air Pump

Great one way check valve for aquarium air pump Protect you air pump by preventing aquarium water from back siphoning during a power outage. Small and compact / Made of durable plastic It's easy to install Compatible with standard aquarium air pipe of 4mm inner diameter These are great check valves for aquarium air pump. They can prevent the water in aquarium from flowing to the air pump. Descriptions: Great one way check valve for aquarium air pump Protect you air pump by preventing aquarium water from back siphoning during a power outage. Small and compact Made of durable plastic It's easy to install Compatible with standard aquarium air pipe of 4mm inner diameter Full Length: Approx. 4.3 Color: Red Package Included: 10 x one way check valve