Your search for "QFX FAN" revealed the following:
Juniper QFX5120-32C-AFI 32x 100GB QSFP28 Back-to-Front Airflow Switch
SKU: NSH-9464
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
Juniper QFX520048Y-DPSU-AI QFX5200 DC 650W B-F Airflow Switch Power Supply
SKU: NSB-5049
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
NEW Cisco Meraki MA-FAN-16K F-B Air Fan Module for MS350 MS410 Switches
SKU: NSN-8227
Condition: New
Shipping: Overnight Options
Warranty: 365 days
Juniper JPSU-1100W-AC-AFO QFX Series 1100W AC Front to Back Air Power Supply
SKU: NSB-5044
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
NEW Juniper QFX5100-24Q-AA-AFI 24x 40GB QSFP+ 1x DW Slot B-F Airflow Switch
SKU: NSN-3775
Condition: New
Shipping: Overnight Options
Warranty: 365 days
NEW Juniper QFX5200-32C-DC-AFI 32x 100GB QSFP28 Back-to-Front Air (DC) Switch
SKU: NSN-3630
Condition: New
Shipping: Overnight Options
Warranty: 365 days
NEW Juniper QFX5200-48Y-AFO 48x 25GB SFP28 6x 100GB QSFP28 F-B Air Switch
SKU: NSN-3538
Condition: New
Shipping: Overnight Options
Warranty: 365 days
NEW Dell CNY0X Front-to-Back Airflow (I/O - PSU) Red Tape Switch Fan Module
SKU: NSN-1231
Condition: New
Shipping: Overnight Options
Warranty: 365 days
Juniper QFX5110-48S-DC-AFI 48x 10GB SFP+ 4x 100GB QSFP28 B-F Airflow (DC) Switch
SKU: NSH-8242
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
NEW Juniper QFX3008-SF16Q QFX Series 16x 40GB QSFP+ Switch Module
SKU: NSN-8676
Condition: New
Shipping: Overnight Options
Warranty: 365 days