One Way Non-Return Check Valve For CO2 Aquarium air Fish Tank Water Air Line Pump

Specification:
Material: durable plastic
Overall Size: 53x15mm (LxW)
Color: Black， Clear

Feature:
-1% Brand new and high quality one way check valve for aquarium air pump.
-Small and compact
-Protect you air pump by preventing aquarium water from back siphoning during a power outage and casing damage.
-Easy to install
-Compatible with standard aquarium air pipe of 4mm inner diameter

1 x One Way Check Valve