Your search for "qfx fan" revealed the following:
Juniper QFX-PFA-4Q QFX Series 4x 40GB QSFP+ Packet Flow Accelerator Module
SKU: NSH-9445
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
Juniper JPSU-850W-DC-AFO QFX5120 Series 850W DC F-B Airflow Power Supply
SKU: NSB-0441
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
NEW Juniper JPSU-850W-AC-AFO QFX Series 850W AC Front-to-Back Air Power Supply
SKU: NSN-3481
Condition: New
Shipping: Overnight Options
Warranty: 365 days
NEW Juniper QFX5200-48Y-AFI 48x 25GB SFP28 6x 100GB QSFP28 B-F Airflow Switch
SKU: NSN-3632
Condition: New
Shipping: Overnight Options
Warranty: 365 days
Juniper JPSU-850W-DC-AFI QFX5100 Series 850W DC B-F Airflow Power Supply
SKU: NSB-0157
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
Mellanox MTDF-FAN-B CS7500 Series Spine Side Fan Unit
SKU: NSB-1013
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
Juniper JNP-3000W-AC-AFO AC F-B PSU for QFX5230, QFX5700 and ACX PTX Routers
SKU: NSB-1020
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
Juniper JPSU-850W-DC-AFO QFX5200 Series 850W DC F-B Airflow Power Supply
SKU: NSB-0514
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
Juniper QFX5200-32C-DC-AFO 32x 100G QSFP28 Front-to-Back Airflow (DC) Switch
SKU: NSH-8255
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
Juniper JPSU-850W-DC-AFO QFX5100 Series 850W DC F-B Airflow Power Supply
SKU: NSB-0156
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days