uxcell Suction Cup Fish Tank Aquarium Heater Clip Airline Tubing Glass Holder, 33mm Dia - Black (15 pcs) The suction cup part is made of soft silicone material, it will stay firmly on the surface of your fish tank or aquarium Equally install the holders to the aquarium and place the aquarium glass over on it With 2 pieces suction cups, you can easily install the glass clips Holder is reliable and can be used for both salt water tanks and fresh water tanks Size:	38 x 33 x 33mm / 1.5 x 1.3 x 1.3 Inches (L x W x H) Color: Black; Material: Plastic,Silicone & Fit tube diameter: 24mm Net weight: 115g & Package content: 15 x Aquarium heater clip