Your search for "qfx fan" revealed the following:

Juniper QFX5100-24Q-D-3AFI 24x 40GB QSFP+ 2x Mod Slots B-F Air (DC) Switch

SKU: NSH-8234
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days

Juniper JPSU-850W-AC-AFI QFX5100 Series 850W AC B-F Airflow Power Supply

SKU: NSH-9448
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days

Juniper QFX5200-48Y-DC-AFO 48x 25GB SFP28 6x 100GB QSFP28 F-B Air (DC) Switch

SKU: NSH-8259
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days

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

SKU: NSH-7066
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days

NEW Juniper QFX5100-24Q-D-3AFI 24x 40GB QSFP+ 2x Mod Slots B-F Air (DC) Switch

SKU: NSN-3777
Condition: New
Shipping: Overnight Options
Warranty: 365 days

NEW Cisco NXA-FAN-65CFM-PE Back-to-Front Airflow (Port Side Exhaust) Switch Fan

SKU: NSN-8261
Condition: New
Shipping: Overnight Options
Warranty: 365 days

Cisco NXA-FAN-35CFM-PI Nexus 9300 F-B Airflow (Port Side Intake) Switch Fan

SKU: NSH-9002
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days

Juniper QFX5210-64C-AFO2 QFX5210 Series 64x 100GB QSFP28 F-B Airflow Flex Switch

SKU: NSB-3894
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days

Cisco NXA-FAN-65CFM-PE Back-to-Front Airflow (Port Side Exhaust) Switch Fan

SKU: NSH-8371
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days

NEW Juniper QFX5100-48T-DC-AFI 48x MultiGB RJ45 6x 40GB QSFP+ B-F (DC) Switch

SKU: NSN-4199
Condition: New
Shipping: Overnight Options
Warranty: 365 days