HP 393565-001 - Base enclosure (chassis bottom) - For De-Featured (DF) models - Does not include the speaker assembly Retail
HP 516297-001 - Base enclosure (bottom chassis) assembly - For defeatured (DF) 35W models - Includes rubber feet Retail
HP 516298-001 - Base enclosure (bottom chassis) assembly - For defeatured (DF) 45W models - Includes rubber feet Retail
HP 578090-001 - Base enclosure (bottom chassis) assembly - For full-featured (FF) 35W models - Includes rubber feet Retail