Your search for "dell n4064" revealed the following:
Dell 407-BBOZ VJW01 40GB BASE-SR 850nm MPO OM3/OM4 QSFP+ Transceiver
SKU: NSB-3773
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
Dell S4048T-ON-RA 210-AHMV 48x 10GB Copper 6x 40GB QSFP+ B-F Air No OS10 Switch
SKU: NSB-9785
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
Dell Z9264F-ON-RA EMC Z-Series 64x 100GB QSFP28 Back-to-Front Air OS10 Switch
SKU: NSB-7049
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
Dell S5000-RA 210-AAWU 6KJC5 4x Slot 4x 40GB QSFP+ B-F Airflow SAN Switch
SKU: NSB-6554
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
Dell S4048T-ON 210-AHMR 48x 10GB Copper 6x 40GB QSFP+ F-B Air OS9 Switch
SKU: NSB-2485
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
NEW Dell S4048-ON-RA 48x 10GB SFP+ 6x 40GB QSFP+ B-F Airflow 210-ADUZ Switch
SKU: NSN-8120
Condition: New
Shipping: Overnight Options
Warranty: 365 days
Dell Z9332F-ON Z-Series 32x 400GB QSFP-DD F-B Airflow (No OS10 License) Switch
SKU: NSB-9753
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
NEW Dell S5000-RA 210-AAWU 6KJC5 4x Slot 4x 40GB QSFP+ B-F Airflow SAN Switch
SKU: NSN-8135
Condition: New
Shipping: Overnight Options
Warranty: 365 days
NEW Dell S4048T-ON-RA 210-AHMV 48x 10GB Copper 6x 40GB QSFP+ B-F Air OS10 Switch
SKU: NSN-0178
Condition: New
Shipping: Overnight Options
Warranty: 365 days
NEW Dell Z9332F-ON Z-Series 32x 400GB QSFP-DD Front-to-Back Airflow OS10 Switch
SKU: NSN-9936
Condition: New
Shipping: Overnight Options
Warranty: 365 days