ASA5585-FAN= ASA 5585-X Spare Fan Module
ASA 5585-X Chassis with SSP10, 8GE, 2GE Mgt, 1 AC, DES Part Number:ASA5585-S10-K8
ASA 5585-X Chassis with SSP40,6GE,4SFP+,2GE Mgt,1 AC,DES Part Number:ASA5585-S40-K8
ASA 5585 Rail kit Part Number:ASA5585-RAILS=
ASA 5555-X with SW, 8GE Data, 1GE Mgmt, DC, DES Part Number:ASA5555-DC-K8
2 GB Memory Upgrade for Cisco ASA 5540 Part Number:ASA5540-MEM-2GB=