Turn the dial to control the percentage of time that these heaters cycle on, from 5% to 100%. Commonly used to thaw pipes, prevent valves from freezing, and heat beakers and flasks in labs, they're good for temporary and occasional use where rapid heating is required but precise temperature control is not.

A durable copper cable cover protects these heaters from moisture, abrasion, and damage better than a plastic or rubber cable cover.

These heaters require a power-connection kit.