Your search for "qfx fan" revealed the following:
Juniper QFX3600-I-16Q-AFO 16x 40GB QSFP+ 2x 1GB SFP Front-to-Back Airflow Switch
SKU: NSB-0314
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
Juniper QFX5100-24Q-DC-AFI 24x 40GB QSFP+ 2x Mod Slots B-F Airflow (DC) Switch
SKU: NSH-8214
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
Juniper QFX5200-48Y-AFI 48x 25GB SFP28 6x 100GB QSFP28 B-F Airflow Switch
SKU: NSH-8256
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
Juniper QFX5210-64C-DC-AFO 64x 100GB QSFP28 F-B Airflow (DC) Switch
SKU: NSH-8263
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
NEW Juniper QFX5100-48T-AFI 48x 10GB Copper 6x 40GB QSFP+ B-F Air Switch
SKU: NSN-1866
Condition: New
Shipping: Overnight Options
Warranty: 365 days
Cisco NXA-FAN-160CFM-PI Nexus 9000 F-B Airflow (Port Side Intake) Switch Fan
SKU: NSB-7713
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
Juniper JPSU-850W-DC-AFO QFX Series 850W DC Front to Back Airflow Power Supply
SKU: NSB-5045
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
NEW Juniper QFX5100-24Q-DC-AFI 24x 40GB QSFP+ 2x Mod Slots B-F Air (DC) Switch
SKU: NSN-3902
Condition: New
Shipping: Overnight Options
Warranty: 365 days
NEW Juniper QFX5200-48Y-DC-AFO 48x 25GB SFP28 6x 100GB QSFP28 F-B Air DC Switch
SKU: NSN-3634
Condition: New
Shipping: Overnight Options
Warranty: 365 days
Juniper JPSU-850W-AC-AFI QFX5200 Series 850W AC B-F Airflow Power Supply
SKU: NSB-0505
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days