Your search for "qfx fan" revealed the following:

NEW Juniper JPSU-650W-DC-AFO QFX5120 Series 650W DC F-B Airflow Power Supply

SKU: NSN-0389
Condition: New
Shipping: Overnight Options
Warranty: 365 days

Ruckus Brocade ICX7750-FAN-E Front-to-Back Airflow (Port Side Intake) Switch Fan

SKU: NSH-7527
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days

NEW Cisco C4KX-FAN-F Catalyst 4500-X Series Back-to-Front Cooling Switch Fan

SKU: NSN-6200
Condition: New
Shipping: Overnight Options
Warranty: 365 days

NEW Cisco NXA-FAN-30CFM-F Nexus 9300 B-F (Port Side Exhaust) Fan Module

SKU: NSN-9770
Condition: New
Shipping: Overnight Options
Warranty: 365 days

NEW Extreme XN-FAN-001-R SLX 9150 Series Back-to-Front Airflow Switch Fan

SKU: NSN-0164
Condition: New
Shipping: Overnight Options
Warranty: 365 days

Juniper JPSU-850W-AC-AFI 850W AC B-F PSU for QFX5100, QFX5120, QFX5200, ACX

SKU: NSB-0448
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days

NEW Extreme 17115 SLX 9030 Series Front to Back Airflow Switch Fan

SKU: NSN-5848
Condition: New
Shipping: Overnight Options
Warranty: 365 days

NEW Cisco NXA-FAN-35CFM-PE Nexus 9000 Back-to-Front Airflow Switch Fan Module

SKU: NSN-0437
Condition: New
Shipping: Overnight Options
Warranty: 365 days

Juniper JPSU-1100W-AC-AFI QFX Series 1100W AC B-F Air Switch Power Supply

SKU: NSH-9976
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days

NEW Cisco N9K-C9300-FAN2 Front-to-Back Airflow (Port-Side Intake) Switch Fan

SKU: NSN-5235
Condition: New
Shipping: Overnight Options
Warranty: 365 days