Your search for "dell s4148" revealed the following:
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 N3248P-ON-RA 48x 1GB PoE RJ45 4x 10GB SFP+ 2x QSFP28 B-F OS6 Switch
SKU: NSN-9976
Condition: New
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 S5248F-ON 48x 25GB SFP28 2x 200GB QSFP28-DD 4x 100GB QSFP28 F-B OS10 Switch
SKU: NSH-9215
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
Dell N1108P-ON N1100 Series 8x 1GB PoE+ RJ45 2x 1GB Combo EMC Switch
SKU: NSH-9912
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
Dell S4128T-ON-RA 28x 10GB Copper 2x 100GB QSFP28 B-F 210-ALTI (No OS10) Switch
SKU: NSB-9747
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
Dell S4112T-ON 12x 10GB Copper 3x 100GB QSFP28 F-B Air AC (No OS10) Switch
SKU: NSB-9779
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
NEW Dell S5000 210-AAWT EMC S5000 4x Module Slot 4x 40GB QSFP+ F-B Airflow Switc
SKU: NSN-8134
Condition: New
Shipping: Overnight Options
Warranty: 365 days
NEW Dell S4128F-ON 210-ALSY 28x 10GB SFP+ 2x 100GB QSFP28 F-B Air OS10 Switch
SKU: NSN-2200
Condition: New
Shipping: Overnight Options
Warranty: 365 days
NEW Dell N3248TE-ON 48x 1GB RJ45 4x 10GB SFP+ 2x QSFP28 F-B Air OS10 Switch
SKU: NSN-9972
Condition: New
Shipping: Overnight Options
Warranty: 365 days