Your search for "QSFP28" revealed the following:

NEW Dell S4148F-ON 210-ALSI 48x SFP+ 4x QSFP28 2x QSFP+ F-B Air OS10 Switch

SKU: NSN-1906
Condition: New
Shipping: Overnight Options
Warranty: 365 days

Dell Q28-100G-ESR4 100GB BASE-ESR 850nm MMF QSFP28 Transceiver

SKU: NSB-5958
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days

NEW Mellanox MCP7H00-G01A 1.5m 100GB QSFP28 to 2x 50GB QSFP28 Breakout Cable

SKU: NSN-8332
Condition: New
Shipping: Overnight Options
Warranty: 365 days

NEW Dell S4128F-ON 210-ALSY 28x 10GB SFP+ 2x 100GB QSFP28 F-B (No OS10) Switch

SKU: NSN-9932
Condition: New
Shipping: Overnight Options
Warranty: 365 days

NEW HPE Q2F24A SN2100M 8x 100 Gigabit QSFP28 Back-to-Front Airflow Switch

SKU: NSN-2448
Condition: New
Shipping: Overnight Options
Warranty: 365 days

Dell S4128T-ON 28x 10GB Copper 2x 100GB QSFP28 F-B Air 210-ALTC OS10 Switch

SKU: NSB-9746
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days

Dell S4128T-ON 28x 10GB Copper 2x 100GB QSFP28 F-B Air 210-ALTC (No OS10) Switch

SKU: NSH-9211
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days

Cisco N9K-C93600CD-GX 28x 100GB QSFP28 8x 400GB QSFP-DD F-B Airflow (DC) Switch

SKU: NSB-2971
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days

Dell S5212F-ON-RA 12x 25GB SFP28 3x 100GB QSFP28 B-B Air No OS10 Switch

SKU: NSB-9769
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days

NEW Dell S4128T-ON 28x 10GB Copper 2x 100GB QSFP28 F-B Air 210-ALTC OS10 Switch

SKU: NSN-1905
Condition: New
Shipping: Overnight Options
Warranty: 365 days