Your search for "qfx fan" revealed the following:

NEW Juniper EX4400-FAN-AFI EX4400 Series Switch Fan Module

SKU: NSN-1315
Condition: New
Shipping: Overnight Options
Warranty: 365 days

Cisco N7K-C7009-FAN Nexus 7000 Series 9-Slot Switch Fan Tray

SKU: NSH-2620
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days

Juniper SRX5800-HC-FAN SRX5800 Series High Capacity Services Gateway Fan Tray

SKU: NSB-0351
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days

NEW Cisco N7K-C7010-FAN-F Nexus 7000 Series 10-Slot Fabric Switch Fan Tray

SKU: NSN-1623
Condition: New
Shipping: Overnight Options
Warranty: 365 days

Cisco Meraki FAN-MS420-R MS420 Series Switch Fan Module

SKU: NSB-3238
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days

NEW Cisco N2K-C2232-FAN Nexus 2000 Back-to-Front Airflow Switch Fan Module

SKU: NSN-0390
Condition: New
Shipping: Overnight Options
Warranty: 365 days

Juniper JPSU-650W-DC-AFO QFX5120 Series 650W DC F-B Airflow Power Supply

SKU: NSB-0456
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days

NEW Cisco N5624-B-24Q 24x 40GB QSFP+ Front-to-Back Airflow Switch

SKU: NSN-0330
Condition: New
Shipping: Overnight Options
Warranty: 365 days

NEW Cisco ASR-9922-FAN ASR 9900 Series 12 Fan Router Fan Tray

SKU: NSN-3269
Condition: New
Shipping: Overnight Options
Warranty: 365 days

Juniper JNP-FAN-1RU MX Series Router Fan Tray for MX204

SKU: NSH-7292
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days