Your search for "qsfp28" revealed the following:
NEW Juniper EX4650-48Y-DC-AFO 48x 25GB SFP28 8x 100GB QSFP28 F-B Airflow Switch
SKU: NSN-3467
Condition: New
Shipping: Overnight Options
Warranty: 365 days
Mellanox MCP7H00-G003RP 3m 100GB QSFP28 to 2x 50GB QSFP28 Breakout Cable
SKU: NSB-3213
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
NEW Cisco N9K-X9736C-EX Nexus 9700 Series 36x 100GB QSFP28 Switch Line Card
SKU: NSN-0716
Condition: New
Shipping: Overnight Options
Warranty: 365 days
NEW Juniper JNP-100G-DAC-1M 1m 100GB QSFP28 Direct Attach Copper Cable
SKU: NSN-5681
Condition: New
Shipping: Overnight Options
Warranty: 365 days
NEW Juniper JNP-100G-DAC-3M 3m 100GB QSFP28 Direct Attach Copper Cable
SKU: NSN-6065
Condition: New
Shipping: Overnight Options
Warranty: 365 days
NEW Dell S5232F-ON-RA 32x 100GB QSFP28 2x 10GB SFP+ B-F Air No OS10 Switch
SKU: NSN-9943
Condition: New
Shipping: Overnight Options
Warranty: 365 days
NEW Juniper QFX5120-48Y-DC-AFI 48x 25GB SFP+ 8x 100GB QSFP28 B-F Air (DC) Switch
SKU: NSN-3628
Condition: New
Shipping: Overnight Options
Warranty: 365 days
Juniper JNP-QSFP-100G-CWDM 100GB BASE-CWDM4 1330nm SMF QSFP28 Transceiver
SKU: NSH-9974
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
NEW Cisco Meraki MS450-12-HW 12x 40GB QSFP+ 2x 100GB QSFP28 Unclaimed Switch
SKU: NSN-3730
Condition: New
Shipping: Overnight Options
Warranty: 365 days
NEW Cisco N9K-C9336C-FX2 36x 100GB QSFP28 Front-to-Back Airflow Switch
SKU: NSN-8187
Condition: New
Shipping: Overnight Options
Warranty: 365 days