Industrial heaters are used to heat a variety of materials. They are available in many different shapes, sizes, and configurations. There are many different types of industrial heaters. Choices include air heaters, band heaters, coil heaters, cable heaters, cartridge heaters, cast-in heaters, ceramic fiber heaters, and circulation heaters. Air heaters are used to heat air. This category includes forced air products and all types of radiant and space heaters. Band heaters are ring-shaped heaters that clamp onto a cylindrical object and heat via conductive heat transfer. Coil heaters and cable heaters are heating elements formed from straight (uncoiled) segments of round or square heating cable. Cartridge heaters are cylindrical heaters that are inserted into a heated substance. Cast-in heaters are made-to-order tubular or wire heaters that are cast into a part. These parts are designed to be an integral component of a larger piece of equipment. Ceramic fiber heaters are only used for radiant heat transfer. They are not designed for conduction heating applications. Circulation heaters are used to heat moving or circulating fluids.