Your search for "qsfp28" revealed the following:
Arista AOC-Q-Q-100G-5M 5m 100GB QSFP28 Active Optical Cable
SKU: NSB-5265
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
NEW Dell S4112F-ON-RA 12x 10GB SFP+ 3x 100GB QSFP28 B-F Air OS10 Switch
SKU: NSN-9957
Condition: New
Shipping: Overnight Options
Warranty: 365 days
NEW Juniper PTX1K-72Q-DC PTX1000 24x 100 Gigabit Ethernet QSFP28 DC PSU Router
SKU: NSN-3726
Condition: New
Shipping: Overnight Options
Warranty: 365 days
Cisco NCS-5064 NCS 5000 Series 64x 100 Gigabit QSFP28 Router Chassis
SKU: NSH-9286
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
NEW Nvidia Mellanox MCP1600-C002E30N 2m 100GB QSFP28 Direct Attach Copper Cable
SKU: NSN-8964
Condition: New
Shipping: Overnight Options
Warranty: 365 days
Ruckus ICX7850-48F-E2 48x 25GB SFP28 8x 100GB QSFP28 Switch
SKU: NSB-6341
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
NEW Juniper QFX5110-48S-DC-AFI 48x 10GB SFP+ 4x 100GB QSFP28 B-F Air (DC) Switch
SKU: NSN-3622
Condition: New
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
NEW Cisco N9K-C93108TC-FX3P 48x MultiGB UPoE RJ-45 6x 100GB QSFP28 FB Air Switch
SKU: NSN-0630
Condition: New
Shipping: Overnight Options
Warranty: 365 days
Nvidia Mellanox MSN2700-CS2RC 32x 100GB QSFP28 F-B (C2P) Cumulus Linux Switch
SKU: NSB-6737
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days