HP 598206-001 - Base enclosure - Includes seven rubber feet - For use with 6440b and 6445b models Retail
HP 598205-001 - Base enclosure - Includes seven rubber feet - For use with 6540b and 6545b models Retail
HP 595772-001 - CPU base enclosure (chassis bottom) - For use with EliteBook 8540w models without an RJ-11 cap - Includes rubber feet Retail
HP 487142-001 - CPU base enclosure (chassis bottom) - Includes seven rubber feet - For use only with computer models equipped with both WLAN and WW Retail