17" long, rated for aquariums up to 159 gallons. High-tech electronic aquarium heater you can recalibrate for ultimate temperature control. This Jager Thermostat Aquarium Heater allows easy manual re-calibration to ensure precision aquarium heating and temperature regulation.
Quality German engineering boosts aquarium heating performance for improved efficiency and fully submersible operation in fresh or saltwater aquariums. Shatterproof laboratory glass housing resists cold water shock and thermo-safety control shuts heater off automatically when water level dips too low. ON/OFF indicator light for at-a-glance monitoring of heater operation. Adjustable temperature range from 64°F to 93°F with +/-0.5°F accuracy. Six foot power cord. Maximum outside diameter on all aquarium heaters is 1".