Fit for 3/16" ID or 1/4" OD Standard aquarium airline tubing or CO2 Tubing.
Soft clear plastic sucker is easy to install and uninstall on fish tank, aquarium and any other glass surface.
Make sure to keep both suction cups and glass surface clean and dry. Replace the old and worn down suction cups timely.
Each suction come with one clip. You can easily adjust shape and position of tubing. They will turn white after a while of use in water.
Package Content: 20 x Aquarium suction cups.