Features:
Good Suction, Can be used for aquarium and any glass surface .
Elastic holder clip, well clip air line and easy to install / uninstall.
Durable and practical 

Material: Plastic
Diameter of clip(Approx.): 5mm, 6mm, 10mm, 13mm, 17mm, 20mm, 23mm, 28mm
Dia. of the bottom for four types of suction cups: 30mm
Color: clear for bottom, white for clip
Quantity: 5 PCS/lot

Including:
5 * Aquarium Sucker Cups/Suction Cups