Features: Good Suction, Can be used for aquarium and any glass surface . Fits for aquarium filters, water pumps. Durable and economic. Description: Material: Plastic Diameter of suction cup(Approx.): 2.8cm/2.0cm Size:20*7mm,28*9mm Color : Black Quantity: 10 PCS Including:10 * SuckerCups Note: Please allow 1cm differs due to manual measurement. Due to the different display and different light, the picture may be a little different with the actual color of the item. Thanks for your understanding. The merchant warrants that their products comply with all applicable laws, and are offered only if they comply with Joom's policies and EU Product Safety and Compliance laws.