Berucci Anti-explosion 25 Watt Adjustable Submersible Aquarium Fish Tank Water - 2 Suction Cups, 60 Hz, 110V Fully submersible heaters work in any position (horizontal or vertical) to provide optimum aquarium water temperature. Easy to attach on aquarium tank wall. Item has 2 suction cups, 7" long with a 3ft cord. Made of shock resistant and shatter proof high quality quartz glass Temperature range between 61F and 90F (16C to 32C) Recommended tank size: up to 10 gallon. Safe and reliable in both fresh and salt water aquariums! Automatic shut off when the temperature is reached Berucci is a trademarks of A & S Global, Inc