Your search for "5KFVW" revealed the following:

Dell 5KFVW N4000 Series 2x 40GB QSFP+ Switch Module

SKU: NSH-8069
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days

NEW Dell 5KFVW N4000 Series 2x 40GB QSFP+ Switch Module

SKU: NSN-5068
Condition: New
Shipping: Overnight Options
Warranty: 365 days