Behlen Country AHW30 Companion/Horse Electric and Insulated Waterer Made especially for horses, exotic pets or small farm animals. made with rounded corners for safety. Large access panel for hookup and maintenance and molded-in hold downs 21-inch by 22-inch by 23-inch Deep 8-Inch bowl holds 5.5-gallon The ahw30 is electric and uses a 75-watt super-efficient infrared heating pad, which is thermostatically controlled