Your search for "qsfp28" revealed the following:
Extreme 7520-48YE-8CE-AC-F 48x 25GB SFP28 8x 100GB QSFP28 F-B Air MACsec Switch
SKU: NSB-9982
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
Extreme 100G-LR4-QSFP10KM 100GB SMF 10km LC QSFP28 Transceiver
SKU: NSB-1868
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
NEW Extreme VSP7400-32C-AC-R VSP 7432CQ-R 32x 100G QSFP28 B-F Airflow Switch
SKU: NSN-3549
Condition: New
Shipping: Overnight Options
Warranty: 365 days
NEW Dell S4148U-ON 48x 24x Unified SFP+ 2x QSFP+ 4x QSFP28 F-B OS10 Switch
SKU: NSN-3864
Condition: New
Shipping: Overnight Options
Warranty: 365 days
Mellanox MFA1A00-C100 100m 100GB QSFP28 Active Optical Cable
SKU: NSB-3126
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
NEW Cisco N3K-C3132C-Z 32x 100GB QSFP28 Back-to-Front Airflow Switch
SKU: NSN-7552
Condition: New
Shipping: Overnight Options
Warranty: 365 days
Extreme VSP7400-48Y-8C 48x 25GB SFP28 8x 100GB QSFP28 No Fans No PSU Switch
SKU: NSH-8529
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
HPE Aruba JL705C 44x 25GB SFP28 6x 100GB QSFP28 B-F Air Switch w/ MACsec
SKU: NSB-9696
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
Fiberstore QSFP28-100G-DAC 2m 100GB QSFP28 Direct Attach Copper Cable
SKU: NSB-0676
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
NEW Dell N3248PXE-ON 48x 10GB PoE Copper 4x SFP28 2x QSFP28 F-B Air OS6 Switch
SKU: NSN-9977
Condition: New
Shipping: Overnight Options
Warranty: 365 days