Item Descriptions:
-FUNCTION: Protect you air pump by preventing aquarium water from back siphoning during a power outage.
-MEASUREMENT: Air Hole Diameter: 4mm/0.16inch, Length:5.3cm/2.1inches, Height:1.35cm/0.53inches.
-APPLICATION: Proper size for universal air pump, fish tank, aquarium, fishing tackle shop, etc.
-MATERIAL: Made of high quality Plastic material, not easy to aging, sturdy and durable. Detachable design makes it easier for you to unscrew, clean and repair.
-PACKAGE: 20pcs one way non-return valves, which are enough for daily use and replacement.
Package:
20 x One Way Non-Return Check Valve
Item Specifications:
Material:Plastic
Colour:Red
Air Hole Diameter:4mm/0.16inch
Length:5.3cm/2.1inches
Height:1.35cm/0.53inches