Your search for "EC8404005-E6" revealed the following:

Extreme EC8404005-E6 VSP 8418XSQ 16x 10GB SFP+ 2x 40GB QSFP+ Switch Module

SKU: NSH-9451
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days

NEW Extreme EC8404005-E6 VSP 8418XSQ 16x 10GB SFP+ 2x 40GB QSFP+ Switch Module

SKU: NSN-4997
Condition: New
Shipping: Overnight Options
Warranty: 365 days