THEO heaters are designed with a specific cylindrical shape that renders them virtually shatterproof. Fully submersible, THEO heaters use advanced heating technology function with the PTC (Positive Thermal Coefficient) heating element, This polymer sheet is silk-screened with heating ink (like your car's windshield defroster). This enables the heater to run dry for a short time without damage to the element. Easy-to-read temperature dial.
Specifications Aquarium Type FRESH AND SALTWATER
Length 7 IN.
Width 0.75 IN. DIAMETER
Ul Listed YES
Unit Size 7 IN. X 3/4 IN. DIAMETER
Power Source ELECTRIC
Warranty Two year warranty against defects in materials and workmanship.