Your search for "qsfp28" revealed the following:
NEW Dell S5148F-ON-RA 210-ANCL 48x 25GB SFP28 6x 100GB QSFP28 B-F OS10 Switch
SKU: NSN-9953
Condition: New
Shipping: Overnight Options
Warranty: 365 days
Fiberstore QSFP28-4X25G-DAC 2m 100GB QSFP28 to 4x 25GB SFP28 DA Breakout Cable
SKU: NSB-1323
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
NEW Juniper JNP-100G-4X25G-1M 1m 100 Gigabit QSFP28 to 4x 25 Gigabit SFP+
SKU: NSN-7154
Condition: New
Shipping: Overnight Options
Warranty: 365 days
NEW Dell S5148F-ON-RA 210-ANCL 48x 25GB SFP28 6x 100GB QSFP28 B-F No OS10 Switch
SKU: NSN-8132
Condition: New
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 Cisco N3K-C3132C-Z 32x 100 Gigabit QSFP28 Front-to-Back Airflow Switch
SKU: NSN-8215
Condition: New
Shipping: Overnight Options
Warranty: 365 days
NEW Mellanox MCP7H00-G003RP 3m 100GB QSFP28 to 2x 50GB QSFP28 Breakout Cable
SKU: NSN-8630
Condition: New
Shipping: Overnight Options
Warranty: 365 days
Juniper QFX5200-48Y-AFO 48x 25GB SFP28 6x 100GB QSFP28 F-B Air Switch
SKU: NSH-8257
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
HPE Aruba JL307A 3m 100GB QSFP28 Direct Attach Copper Cable
SKU: NSB-5545
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
NEW Dell S5212F-ON EMC S 12x 25GB SFP28 3x 100GB QSFP28 F-B Air OS10 Switch
SKU: NSN-4145
Condition: New
Shipping: Overnight Options
Warranty: 365 days