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

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

SKU: NSB-1395
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days

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

SKU: NSC-0181
Condition: Seller refurbished
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

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

SKU: NSB-1386
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days