Your search for "QSFP28" revealed the following:
NEW Dell S4148F-ON-RA 210-ALSR 48x SFP+ 4x QSFP28 2x QSFP+ B-F Air OS10 Switch
SKU: NSN-8123
Condition: New
Shipping: Overnight Options
Warranty: 365 days
NEW Juniper QFX5120-48Y-AFO 48x 25GB SFP+ 8x 100GB QSFP28 F-B Air Switch
SKU: NSN-3627
Condition: New
Shipping: Overnight Options
Warranty: 365 days
Dell S5232F-ON EMC S 32x 100GB QSFP28 2x 10GB SFP+ Front-to-Back Air OS10 Switch
SKU: NSH-9217
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
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
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
NEW Dell S5232F-ON 32x 100GB QSFP28 2x 10GB SFP+ Front-to-Back Air OS10 Switch
SKU: NSN-7725
Condition: New
Shipping: Overnight Options
Warranty: 365 days
Dell Q28-100G-BIDI 100GB Bi-Di Short-Reach 150m MMF QSFP28 Transceiver
SKU: NSB-5963
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
NEW Juniper JNP-QSFP-100G-LR4 100GB BASE-LR4 1310nm SMF QSFP28 Transceiver
SKU: NSN-2071
Condition: New
Shipping: Overnight Options
Warranty: 365 days
NEW Extreme 100G-QSFP28-SR4 100GB BASE-SR4 850nm MMF QSFP28 Transceiver
SKU: NSN-6993
Condition: New
Shipping: Overnight Options
Warranty: 365 days
NEW Juniper QFX10000-30C-M QFX 10000 30x 100GB QSFP28 MACsec Switch Line Card
SKU: NSN-3770
Condition: New
Shipping: Overnight Options
Warranty: 365 days