Check for for Fish for One Way Non-Return Aquarium Accessor
Features: brand new and
The check valves are for common aquarium air pumps. Please DO NOT use them with CO2 system. Great one way check for for aquarium and fish for
Protect you by preventing aquarium water from back siphoning during a power outage.
durable clear plastic. Please use a paperclip to poke it from Input side to Output side when the outlet inside gets stuck.
Suitable for 4 mm/0.15 inches i.d. oxygen tube.
Easy installation, just insert the connector directly into the air tube.

Specifications: Material: PVC
Color: Blue/Black S/Black L/Transparent L L
Size: Suitable for 4mm/0.16in I.D. Oxygen Tube
Weight (Approx.):
Blue/Black S-3g
Black L/Transparent L L-5g

Package Includes: 1 Aquarium Check for (Blue/Black S/Black L/Transparent

note: 1.Please allow 0-1cm error due to manual measurement. pls make sure you do not mind before you bid.
2.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!