This category includes DC fans, which are electric fans that operate on direct current power. Examples include ball-bearing mounted fans with specifications such as voltage, wattage, RPM, CFM, and decibel levels. Excludes products related to rust and corrosion inhibitors, lubricants, cover strips, air curtain doors, silicone conformal coatings, PVC and ABS cement pipe fittings, flanged bearing units, potting compounds, seals and O-rings, and shaft collars.