BQLZR Transparent Aquarium Fish Tank Air Line Pipe Tube Pump Suction Cups for 7mm Sucker Pack of 50 Elastic holder clip, well clip air line, easy to install or uninstall Can be used for aquarium airline tubing, check valve, diffusers etc. Suction Cup,made of soft plastic material, It can not be used in the high temperature exposure place, or it can be oxidized Suitable for 5mm tube to use.