Your search for "qfx fan" revealed the following:
Cisco ASR-920-FAN-M ASR920 Series Fan for Router Modular Chassis
SKU: NSH-4613
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
NEW Juniper JPSU-650W-AC-AFI QFX5100 Series 650W AC B-F Air Switch Power Supply
SKU: NSN-0259
Condition: New
Shipping: Overnight Options
Warranty: 365 days
Juniper SRX5800-FAN SRX5800 Series Services Gateway 6x Fan Tray
SKU: NSB-0350
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
Juniper QFX5120-48Y-DC-AFO 48x 25GB SFP28 8x 100GB QSFP28 F-B Air (DC) Switch
SKU: NSH-8251
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
NEW Cisco N6K-C6001-FAN-B Front-to-Back Airflow (Port Side Intake) Fan Module
SKU: NSN-9733
Condition: New
Shipping: Overnight Options
Warranty: 365 days
NEW Juniper QFX3008-SR1 QFX3008-I QFabric Series Switch Rear Fabric Card
SKU: NSN-8900
Condition: New
Shipping: Overnight Options
Warranty: 365 days
Dell CNY0X Front-to-Back Airflow (I/O - PSU) Red Tape Switch Fan Module
SKU: NSB-6587
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
NEW Juniper QFX-QSFP-40G-ESR4 40GB BASE-ESR4 850nm MMF QSFP+ Transceiver
SKU: NSN-3404
Condition: New
Shipping: Overnight Options
Warranty: 365 days
NEW Juniper QFX5100-24Q-DC-AFO 24x 40GB QSFP+ 2x Mod Slots F-B Air (DC) Switch
SKU: NSN-3903
Condition: New
Shipping: Overnight Options
Warranty: 365 days
NEW Cisco N5K-C5696-FAN Back-to-Front Airflow (Port Side Exhaust) Fan Module
SKU: NSN-0297
Condition: New
Shipping: Overnight Options
Warranty: 365 days