Includes components and accessories specifically designed for use with computer or electronic equipment enclosures, such as fans, power supplies, and cable organizers. Excludes structural system cover strips, profile strips, lubricants, air curtain doors, seals and O-rings, potting compounds, rust and corrosion inhibitors, silicone conformal coatings and encapsulants, flanged bearing units, PVC and ABS cement pipe fittings, and shaft collars.