High-Quality Material The aquarium suction cup is made of premium rubber, reliable and sturdy, strong suction, not easy to break, long time for use. Wide Application Fish tank suction cup clamp is suitable for fixing fish tank oxygen pumps, gas pipe, wires and other items, and can replace old suction cups. Size Diameter of the suction cup is about 1.1in (28mm), height: about 0.47in/12mm, the diameter of the insert part is about 0.35in/9mm, hole diameter: about 0.12in(3mm). Specification: Color: black Material: rubber Package Include: 16pcs x fish tank suction cups Aquarium fish tank suction cup provides powerful suction and can be easily sucked onto any smooth glass surface. Fish tank suction cup clip is suitable for fixing fish tank oxygen pump, gas pipe, wire or other items, etc.,which is reliable and firm. Simple structure, easy to install, just a few minutes to complete the installation without other tools. With good practicability and versatility, both salt water and fresh water tanks can perfectly complete the task. Before use, it is necessary to clean the surface of the adsorption required to be clean and tidy, so as to avoid the phenomenon of instability due to foreign matter. Size and color are manual measurement and shooting, please refer to the actual object. Please confirm the specific size when purchasing to avoid misunderstanding.