HP 393564-001 - Base enclosure (chassis bottom) - For Full-Featured (FF) models - Does not include the speaker assembly Retail
HP 578090-001 - Base enclosure (bottom chassis) assembly - For full-featured (FF) 35W models - Includes rubber feet Retail
HP 383921-001 - CPU base enclosure (chassis bottom) - For full-featured (FF) products - Does not include the speaker assembly Part 383921-001 40828 Retail
HP 378240-001 - CPU base enclosure (chassis bottom) - Does not include the speaker assembly - For use with defeatured (DF) models Retail
