The Fluval M Submersible Aquarium Heater"s quality manufacturing utilizes superior components and construction, The Fluval M Series is ideal for use in aquariums from 15-80 gallons and has a temperature range of 66-86 degrees Fahrenheit, This sleek, compact heater can be trusted for exceptional performance and unsurpassed reliability, Unique only to the Fluval ""M"" series the reflective technology equipped in the Fluval M Submersible Aquarium Heater helps maintain the aquariums" natural look as the heater reflects the colors of the surroundings, The Fluval M Submersible Aquarium Heater Features and Benefits:, - Suitable for aquariums up to 80 gallons, - Exceptional performance and unsurpassed reliability, - Slim profile tube for easy placement, - Easy to install, - Built in reflective technology mirrors the surrounding colors, making the heater blend into your aquarium environment, - Easy to adjust temperature control, - Shock resistant Borosilicate glass, - High density ceramic heat sick, - Backed by a three year warranty, 1, 25"" length x 1, 25"" width x 15"" height SKU: RCHG0743