10 Pcs One Way Check for For 4mm Stomatal Diameter Standard Aquarium Suppl
Features: brand new and
The check for is suitable for common aquarium air pumps. Please do not use them with CO2 systems. One-way check for for aquariums and fish tanks.
Protect your by preventing the aquarium water from anti-siphoning during power outages.
transparent plastic. When the socket inside is stuck, please use a paper clip to poke from the input end to the output end.
Stomatal diameter: 0.15" / 4mm; total size: 2.16" x 0.58" / 5.5 x 1.5 for (LengthxMax.D)
Package content: 10 pcs x air check for

Specifications: Material: ABS
Weight: 75g
Size: As the picture shows
Color: Black White

Package Includes: 10x Check Valves

note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order.
2.Due to the difference between different monitors, the picture may not reflect the actual color of the item.