Penn Plax Cascade Preset Submersible Aquarium Heater 50-Watt 7"

*7"/50 WATT HEATER FOR 10 GALLON FRESH AND SALT WATER AQUARIUMS*FULLY SUBMERSIBLE, CAN BE PLACED HORIZONTALLY OR VERTICALLY IN TANK *AUTOMATICALLY SETS AND MAINTAINS DESIRED TEMPERATURE*VISIBLE TEMPERATURE SETTING SCALE AND ACCURATE TO 1 DEGREE *HEAVY DUTY SHOCK-RESISTANT GLASS, SAFER FOR LARGE FISH*TOP-QUALITY HEATING ELEMENT WITH SUPERIOR INSULATION AND HEAT DISTRIBUTION*LIFETIME GUARANTEE!*2 TOP QUALITY SUCTION CUPS INCLUDED*FACTORY PRESET AT 76 DEGREES F, JUST PLUG IN!