Your search for "hpe sfp28" revealed the following:
HPE JG897A 5700-40XG-2QSFP+ 40x 10GB SFP+ 2x 40GB QSFP+ (TAA) Switch
SKU: NSH-6758
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
NEW Dell S4128F-ON 210-ALSY 28x 10GB SFP+ 2x 100GB QSFP28 F-B Air OS10 Switch
SKU: NSN-2200
Condition: New
Shipping: Overnight Options
Warranty: 365 days
NEW HPE 453153-001 453577-001 1GB BASE-SX 850nm MMF SFP Transceiver
SKU: NSN-0917
Condition: New
Shipping: Overnight Options
Warranty: 365 days
NEW Dell S4128F-ON-RA 210-ALTF 28x 10GB SFP+ 2x 100GB QSFP28 B-F Air OS10 Switch
SKU: NSN-8121
Condition: New
Shipping: Overnight Options
Warranty: 365 days
HPE 453153-001 453577-001 1GB BASE-SX 850nm MMF SFP Transceiver
SKU: NSB-1088
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
Dell SFP28-25G-ESR 25GB Extended-SR 300m MMF 850nm SFP28 Transceiver
SKU: NSB-5935
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
NEW HPE J9538A 5400zl Series 8x 10GB SFP+ Switch Module
SKU: NSN-2550
Condition: New
Shipping: Overnight Options
Warranty: 365 days
HPE JG414A FlexNetwork MSR4000 Series SPU-200 SVC Processing Unit
SKU: NSB-8376
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
NEW HPE J9549A 5400zl Series 20x 1GB RJ45 4x 1GB SFP Switch Module
SKU: NSN-3064
Condition: New
Shipping: Overnight Options
Warranty: 365 days
NEW Dell S4128F-ON-RA 210-ALTF 28x 10GB SFP+ 2x 100GB QSFP28 B-F No OS10 Switch
SKU: NSN-9933
Condition: New
Shipping: Overnight Options
Warranty: 365 days