Your search for "hpe sfp28" revealed the following:
NEW Mellanox MMA2L20-AR 25GB BASE-LR 1310nm Duplex LC SMF 10km SFP28 Transceiver
SKU: NSN-8610
Condition: New
Shipping: Overnight Options
Warranty: 365 days
Alcatel-Lucent OS6860E-U28 OmniSwitch 6860 28x 1GB SFP 4x 10GB SFP+ Switch
SKU: NSB-4565
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
NEW HPE AJ716A 8GB Fibre Channel LC MMF SFP+ Transceiver
SKU: NSN-1100
Condition: New
Shipping: Overnight Options
Warranty: 365 days
Fiberstore S28-PC02 2m 25GB SFP28 Direct Attach Copper Cable
SKU: NSB-0588
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
Fiberstore Q-4S28PC02 2m 100GB QSFP28 to 4x 25GB SFP28 Breakout Cable
SKU: NSB-1322
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
Dell S5248F-ON 48x 25GB SFP28 2x 200GB QSFP28-DD 4x 100GB QSFP28 F-B OS10 Switch
SKU: NSH-9215
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
NEW Cisco N540-24Z8Q2C-SYS 24x 10GB SFP+ 8x 25GB SFP28 2x 100GB QSFP28 Router
SKU: NSN-0727
Condition: New
Shipping: Overnight Options
Warranty: 365 days
HPE Aruba J9054D 100M BASE-FX 1310nm MMF LC FX 2km XCVR SFP Transceiver
SKU: NSB-5558
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
NEW HPE Aruba J9054D 100M BASE-FX 1310nm MMF LC FX 2km XCVR SFP Transceiver
SKU: NSN-6201
Condition: New
Shipping: Overnight Options
Warranty: 365 days
NEW Dell S5296F-ON-RA 96x 25GB SFP28 8x 100GB QSFP28 B-F Air (No OS10) Switch
SKU: NSN-9939
Condition: New
Shipping: Overnight Options
Warranty: 365 days