Your search for "fs-448" revealed the following:

NEW Fortinet FS-448E-FPOE 48x 1GB PoE+ RJ45 4x SFP+ Local Management Only Switch

SKU: NSN-8451
Condition: New
Shipping: Overnight Options
Warranty: 365 days

NEW Fortinet FS-448D 48x 1GB RJ45 4x SFP+ Local Management Only Switch

SKU: NSN-8891
Condition: New
Shipping: Overnight Options
Warranty: 365 days

NEW Fortinet FS-448D-FPOE 48x 1GB PoE+ RJ45 4x SFP+ Registrable/Unclaimed Switch

SKU: NSN-1255
Condition: New
Shipping: Overnight Options
Warranty: 365 days

NEW Fortinet FS-448D-POE 400 Campus 48x 1GB RJ45 (24x PoE+) 4x 10GB SFP+ Switch

SKU: NSN-8435
Condition: New
Shipping: Overnight Options
Warranty: 365 days