Your search for "fg-1801f" revealed the following:
Fortinet FG-1801F FortiGate 1800F 140 Gbps Registrable / Unclaimed Firewall
SKU: NSB-0178
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
NEW Fortinet FG-1801F FortiGate 1800F 140 Gbps Registrable / Unclaimed Firewall
SKU: NSN-0758
Condition: New
Shipping: Overnight Options
Warranty: 365 days
Fortinet FG-1801F FortiGate 1800F 140 Gbps Local Management Only Firewall
SKU: NSC-0220
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days