Package included:
5 x Aquarium air pump check valve (Red)
5 x Aquarium air pump check valve (Black)
5 x Aquarium air pump check valve (Trasparent)

Size: 53 x 15mm
Air Hole Diameter: 4mm
Material: ABS plastic

●Necessary parts for your air pump aquarium O2 system
●Fit for 4mm inner diameter standard aquarium air hose
●Perfect for fish tank, aquarium, fishing tackle shop, etc.
●Easy to install, can be applied for common aquarium air pumps
●Prevent the air pump from being damaged by the backflow of water when the air pump stops working or power outage, effective protection for your air pump
●These aquarium air pump check valves are detachable, you can unscrew it to open for easy cleaning and maintenance

Notice:
1. Due to the reason of light and the display, the color may have slight difference. This is inevitable, please understanding!
2. Please allow slight dimension difference due to different manual measurement