100 watt aquarium adjustable heater

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Temperature scale can be adjusted between 66°F – 90°F. A secondary control knob allows for precise readjustment of the temperature within +/- 2°F.
Temperature levels are monitored and controlled by bi-metal technology for automated heating. Includes a thermal shutoff switch for added protection.
High quality quartz glass tube. Able to withstand at least double the temperature of a standard glass and provides additional safety.