Your search for "QFX FAN" revealed the following:
Juniper QFX5210-64C-DC-AFI 64x 100GB QSFP28 B-F Airflow (DC) Switch
SKU: NSH-8262
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
NEW Cisco Meraki MA-FAN-18K F-B Fan Module for MX105, MX250, MX450 Firewalls
SKU: NSN-5504
Condition: New
Shipping: Overnight Options
Warranty: 365 days
NEW Cisco N56128-FAN-F Back-to-Front Airflow (Fan Side Intake) Switch Fan
SKU: NSN-2453
Condition: New
Shipping: Overnight Options
Warranty: 365 days
NEW Juniper QFX5120-48Y-AFO 48x 25GB SFP+ 8x 100GB QSFP28 F-B Air Switch
SKU: NSN-3627
Condition: New
Shipping: Overnight Options
Warranty: 365 days
NEW Cisco FAN-T3-F Catalyst 3850 B-F Airflow Switch Fan Module for the 3850-48XS
SKU: NSN-6869
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
Extreme Brocade BR-MLXE-8-FAN MLXe Series Exhaust Fan Assembly Kit
SKU: NSB-6732
Condition: Seller refurbished
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 QFX520048Y-DPSU-AO QFX5200 DC 650W F-B Airflow Switch Power Supply
SKU: NSB-5050
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
NEW Juniper QFX5220-32CD-AFO 32x 400GB QSFP56-DD Front-to-Back Airflow Switch
SKU: NSN-0931
Condition: New
Shipping: Overnight Options
Warranty: 365 days