Your search for "N6K-C6004" revealed the following:
Cisco N6K-C6004-FAN-F Back-to-Front Airflow (Fan Side Intake) Switch Fan
SKU: NSH-2896
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
$ 69.99
• Only 2 remaining
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NEW Cisco N6K-C6004-M12Q Nexus 6000 12x 40GB QSFP Switch Module
SKU: NSN-8351
Condition: New
Shipping: Overnight Options
Warranty: 365 days
Cisco N6K-C6004-M12Q Nexus 6000 12x 40GB QSFP Switch Module
SKU: NSB-0752
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
Cisco N6K-C6004EF Nexus 6000 Series 6004 EF 8x Expansion Slot Switch Chassis
SKU: NSB-7129
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days