These drum heaters have a thin-line design that provides practical, efficient freeze protection and viscosity control for melting and maintaining materials at elevated temperatures. Wrap-around design with spring fasteners assures easy installation. Totally integrated watertight assembly prevents environmental moisture from interacting with circuitry. Safe for outdoor use. Ships with a fully encapsulated thermostatic controller. Controller has adjustable setting from 50°F to 425°F (10 to 218° C). * Plug not supplied on 240V models. Thermolyne.