Your search for "dell s4148" revealed the following:
NEW Dell N1124P-ON N1100 Series 24x 1GB PoE+ RJ45 4x 10GB SFP+ EMC Switch
SKU: NSN-4875
Condition: New
Shipping: Overnight Options
Warranty: 365 days
NEW Dell S4112T-ON 12x 10GB Copper 3x 100GB QSFP28 F-B Air AC (No OS10) Switch
SKU: NSN-9954
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
NEW Dell Z9332F-ON Z-Series 32x 400GB QSFP-DD F-B Air (No OS10 License) Switch
SKU: NSN-9937
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 409-BBCC 12xFC8ETH10-U RX421 EMC S5000 12x 8GB FC SFP+ Switch Module
SKU: NSN-0684
Condition: New
Shipping: Overnight Options
Warranty: 365 days
NEW Dell S4112T-ON-RA 12x 10GB Copper 3x 100GB QSFP28 B-F AC (No OS10) Switch
SKU: NSN-9955
Condition: New
Shipping: Overnight Options
Warranty: 365 days
Dell S5224F-ON-RA 24x 25GB SFP28 4x 100GB QSFP28 B-F Air OS10 Switch
SKU: NSB-6588
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
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
NEW Dell N3024ET-ON 24x 1GB RJ45 2x 10GB SFP+ 2x 1GB Combo Switch
SKU: NSN-2203
Condition: New
Shipping: Overnight Options
Warranty: 365 days