Safe Material: Our aquarium suction cup is made of environmentally friendly PVC, which is strong and durable, with high flexibility and adsorption. Multifunctional: The product is easy to connect to heating rods, water pipes and any glass surface. Offer better management of your aquarium. Easy to use: no other accessories are required. Just keep the glass surface clean, dry and smooth, then stick the suction cup on it. Design: Each suction cup is equipped with a 16mm clip, which can fix the heating rod of the aquarium. Small and practical, it is your best choice.