Your search for "qfx fan" revealed the following:

Cisco N540X-16Z4G8Q2C-D 16x 10GB SFP+ 8x 25GB SFP28 2x 100GB QSFP28 Router

SKU: NSB-0638
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days

NEW Dell S4148FE-ON-RA 48x 10GB SFP+ 2x 40GB QSFP+ 4x QSFP28 B-F No OS10 Switch

SKU: NSN-9967
Condition: New
Shipping: Overnight Options
Warranty: 365 days

NEW Arista DCS-7050QX-32S-R 32x 40GB QSFP+ 4x 10GB SFP+ Back-to-Front Air Switch

SKU: NSN-1736
Condition: New
Shipping: Overnight Options
Warranty: 365 days

Ruckus ICX7550-48F-E2 36x 1GB SFP 12x 10GB SFP+ 2x 100GB QSFP28 F-B Air Switch

SKU: NSB-7426
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days

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

SKU: NSN-0329
Condition: New
Shipping: Overnight Options
Warranty: 365 days

NEW Cisco ASR-9912-FAN ASR 9900 Series 9912 Router Fan Module

SKU: NSN-4379
Condition: New
Shipping: Overnight Options
Warranty: 365 days

Ruckus ICX7550-48F 36x 1GB SFP 12x 10GB SFP+ 2x 100GB QSFP28 F-B Airflow Switch

SKU: NSB-7420
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days

NEW Arista DCS-7280QR-C36-R 24x 40GB QSFP+ 12x 100GB QSFP28 B-F Airflow Switch

SKU: NSN-2362
Condition: New
Shipping: Overnight Options
Warranty: 365 days

Juniper QFX5200-48Y-DC-AFI 48x 25GB SFP28 6x 100GB QSFP28 B-F Air (DC) Switch

SKU: NSH-8258
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days

NEW Brocade ICX6610-24-I 24x 1GB RJ45 8x 1GB SFP 4x 40GB QSFP+ B-F Air Switch

SKU: NSN-7873
Condition: New
Shipping: Overnight Options
Warranty: 365 days