1. Reliable, Reusable Suction Power --- Made with durable silicone rubber, the aquarium clamps by have a strong, reliable suction force that can be easily moved around without losing its sticking power. Each removable holder comes with its own clip to hold the airline, hose and other tubing. 2. Perfectly Sized For Aquarium Accessories --- These 20 transparent Aquarium Suction Cup Clips are designed to fit into your underwater habitat with minimal visual impact. The suction cups have a diameter of approximately 1" (2.5cm) and the attached clips fit standard 3/16" (0.5cm) airline or CO2 tubing. 3. Maintain A Neat And Tidy Habitat --- By the time you add the air pump, filter, air stone and decorations to your aquarium or terrarium, it can appear messy or cluttered. The handy clampers and matching mounts discreetly hold loose tubes and hose in place to maintain a neat and tidy habitat for your pet fish, shrimp, and plants. 4. Sticks To Smooth, Non-Porous Surfaces --- Although most commonly used on glass and acrylic, these versatile suction pads adhere even to any smooth, non-porous surface like tile, fiberglass, porcelain and certain metals. Make sure the product and the surface are clear and from debris before sticking.