Your search for "QFX FAN" revealed the following:

Cisco N5K-C5696-FAN-B Front-to-Back Airflow (Port Side Intake) Fan Module

SKU: NSB-3226
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days

NEW Juniper EX4600-40F-DC-AFO 24x 10GB SFP+ 4x 40GB QSFP+ F-B Air (DC) Switch

SKU: NSN-3899
Condition: New
Shipping: Overnight Options
Warranty: 365 days

NEW Cisco N5K-C5010-FAN Nexus 5000 Series 5010 Switch Fan Module

SKU: NSN-5386
Condition: New
Shipping: Overnight Options
Warranty: 365 days

Cisco UCSC-FAN-C220M4 UCS C220 M4 Series Server Fan Module

SKU: NSB-4318
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days

NEW Cisco C9404-FAN Catalyst 9400 Series 4 Slot Switch Chassis Fan Tray

SKU: NSN-5303
Condition: New
Shipping: Overnight Options
Warranty: 365 days

NEW Dell S4148F-ON 210-ALSI 48x SFP+ 4x QSFP28 2x QSFP+ F-B Air OS10 Switch

SKU: NSN-1906
Condition: New
Shipping: Overnight Options
Warranty: 365 days

NEW Cisco DS-C96S-FAN-E MDS 9300 Series Port Side Exhaust Switch Fan Module

SKU: NSN-9676
Condition: New
Shipping: Overnight Options
Warranty: 365 days

NEW Cisco N5K-C5624Q 12x 40GB QSFP+ 1x GEM Slot Front-to-Back Air Switch Chassis

SKU: NSN-0327
Condition: New
Shipping: Overnight Options
Warranty: 365 days

NEW Arista FAN-7001D-F 7280R Series Spare Front-to-Rear Air Switch Fan Module

SKU: NSN-6564
Condition: New
Shipping: Overnight Options
Warranty: 365 days

Juniper FFANTRAY-MX240-HC-S MX240 Series High Capacity Switch Fan Tray

SKU: NSH-9640
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days