Your search for "qsfp28" revealed the following:

NEW Dell S4148F-ON-RA 210-ALSR 48x SFP+ 4x QSFP28 2x QSFP+ B-F (No OS10) Switch

SKU: NSN-9931
Condition: New
Shipping: Overnight Options
Warranty: 365 days

NEW Dell S4148FE-ON 48x 10GB SFP+ 2x 40GB QSFP+ 4x QSFP28 F-B Air OS10 Switch

SKU: NSN-1909
Condition: New
Shipping: Overnight Options
Warranty: 365 days

Dell S4148U-ON-RA 48x (24x Unified) SFP+ 2x 40GB QSFP+ 4x QSFP28 B-F OS10 Switch

SKU: NSB-6545
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days

Fiberstore Q-4S2802 2m 100GB QSFP28 to 4x 25GB SFP28 DAC Breakout Cable

SKU: NSB-9823
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days

NEW Cisco UCS-FI-6454 UCS 6454 18x 25GB SFP28 2x 100GB QSFP28 Interconnect

SKU: NSN-9197
Condition: New
Shipping: Overnight Options
Warranty: 365 days

Juniper JNP-100G-DAC-3M 3m 100GB QSFP28 Direct Attach Copper Cable

SKU: NSH-9322
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days

NEW Juniper JNP-100G-AOC-5M 5m 100GB QSFP28 Active Optical Cable

SKU: NSN-4717
Condition: New
Shipping: Overnight Options
Warranty: 365 days

NEW Dell S5248F-ON-RA 48x 25GB SFP28 2x QSFP28-DD 4x QSFP28 B-F No OS10 Switch

SKU: NSN-9941
Condition: New
Shipping: Overnight Options
Warranty: 365 days

Cisco UCS-FI-64108-U UCS 64108 36x 25G SFP28 4x 100G QSFP28 Fabric Interconnect

SKU: NSB-6667
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days

NEW Arista CAB-Q-4S-100G-3M 3m 100GB QSFP to 4x 25GB SFP28 DA Breakout Cable

SKU: NSN-6232
Condition: New
Shipping: Overnight Options
Warranty: 365 days