Your search for "nxa-fan" revealed the following:
Juniper QFX5110-FANAFI QFX5110 Series Back to Front Airflow Switch Fan
SKU: NSH-9320
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
Juniper JNP-FAN-1RU MX Series Router Fan Tray for MX204
SKU: NSH-7292
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
NEW Cisco ASR-920-FAN-M ASR920 Series Fan for Router Modular Chassis
SKU: NSN-9545
Condition: New
Shipping: Overnight Options
Warranty: 365 days
Cisco N9K-C9504-B2 Nexus 9504 Switch Bundle
SKU: NSH-8929
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
Juniper QFX5200-32C-FANAFO QFX5200 Series F-B Airflow Switch Fan Module
SKU: NSB-5053
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
Juniper SRX1400-FAN SRX1400 Series Services Gateway Fan Tray
SKU: NSH-8966
Condition: Seller refurbished
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
Cisco ASR-9001-FAN-V2 ASR 9000 Series Router Fan Assembly
SKU: NSH-6778
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
NEW Cisco N9K-PAC-650W-B 650W AC B-F Airflow (Port-Side Exhaust) Power Supply
SKU: NSN-8055
Condition: New
Shipping: Overnight Options
Warranty: 365 days