Features: - The suction power of the aquarium is very strong, it is not easy to fall off, and the installation and disassembly are very convenient. - Aquarium suction cup made of ecological material, does not harm your fish or other living beings in the water. - The suction cup holder can be firmly attached to the surface of the fish tank or fish tank. - Aquarium suction cups can be used not only for heating rods, but also for LED tubes and water pipes, to keep the aquarium clean and beautiful. Specifications: Material: PVC. Color: black Suction cup diameter: 30 mm. Inner diameter of the clip: 20 mm. Quantity: 30 Content: 30 supports for aquarium suction cups. Tip: Due to lighting effect, monitor’s brightness, manual measurement, etc., there may be some slight differences in the color and size between the the photo and the real one. Article. Thanks for your understanding. Thank you very much. Guaranteed satisfaction: Your satisfaction is our greatest ambition. If you have any problems