Brand new one way check valve.
Made of durable plastic,small and compact, easy to install.
Great one way check valve for aquarium air pump.
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.
Full Length(approx.): 45*15*4mm/1.77”*0.59”*0.16”
Package includes: 1 x One Way CO2 Check Valve
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