Perfect for small aquariums containing pipes, connecting moss and objects or positioning small plants. The zip ties fit perfectly into the suction cups. Diameter of the suction cup after adsorption: 2.8 cm. The length of the cable ties: 10 cm. The soft clear plastic suction cup is easy to install and uninstall on the fish tank, fish tank and other glass surface. Be sure to keep the suction cups and glass surface clean. Replace old and worn suction cups timely. What you get: 20 suction cups and 40 cable ties.