Your search for "hpe sfp28" revealed the following:
Extreme 10522 5m 25GB SFP28 Direct Attach Copper Cable
SKU: NSH-9417
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
NEW Arista AOC-S-S-25G-3M 3m 25GB SFP28 Active Optical Cable
SKU: NSN-5304
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 N540-28Z4C-SYS-A NCS 540 28x 10GB SFP+ 4x 100GB QSFP28 Router
SKU: NSB-8202
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
NEW Third Party for Arista CAB-S-S-25G-4M 4m 25GB SFP28 DAC Cable
SKU: NSN-1212
Condition: New
Shipping: Overnight Options
Warranty: 365 days
NEW Juniper JNP-100G-4X25G-3M 3m 100GB QSFP28 to 4x 25GB SFP+ Breakout Cable
SKU: NSN-4749
Condition: New
Shipping: Overnight Options
Warranty: 365 days
Juniper QFX5200-48Y-AFI 48x 25GB SFP28 6x 100GB QSFP28 B-F Airflow Switch
SKU: NSH-8256
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
NEW Dell S5224F-ON-RA 24x 25GB SFP28 4x 100GB QSFP28 B-F Air OS10 Switch
SKU: NSN-8136
Condition: New
Shipping: Overnight Options
Warranty: 365 days
Dell S5224F-ON-RA 24x 25GB SFP28 4x 100GB QSFP28 B-F Air No OS10 Switch
SKU: NSB-9767
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
Cisco N9K-C93180YC-EX-24 24x 25GB SFP28 6x 100GB QSFP28 B-F Airflow Switch
SKU: NSB-9752
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days