SODIAL(R) 10X Aquarium Sucker Suction Cup for 4/6mm Air Line Pipe Tube Wire Holder 2.5*2CM Brand new and high quality Good Suction, Can be used for aquarium and any glass surface Elastic holder clip, well clip air line and easy to install / uninstall Fits for 4mm/6mm standard air line You can adjust air line length and shape according to your demand with this suction cups