Perfect for small aquariums containing piping, 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: 10cm. The soft transparent plastic suction cup is easy to install and uninstall on the fish tank, fish tank and any other glass surface. Make sure to keep the clean suction cups and glass surface. Replace old and worn suction cups timely.