Your search for "QSFP28" revealed the following:
Nvidia Mellanox MFA1A00-C015 15m 100GB QSFP28 Active Optical Cable
SKU: NSB-3136
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
Nvidia Mellanox MSN2700-CS2F 32x 100GB QSFP28 B-F Airflow (P2C) Onyx Switch
SKU: NSB-6731
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
Nvidia Mellanox MSN2100-CB2R 16x 100GB QSFP28 Front-to-Back (C2P) Onyx Switch
SKU: NSB-6762
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
Juniper EX9251-8X4C EX9250 Series 8x 10GB SFP+ 4x 100GB QSFP28 Switch
SKU: NSH-9325
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
Nvidia Mellanox MMA1B00-E100 100GB BASE-SR4 850nm MMF MPO QSFP28 Transceiver
SKU: NSB-3083
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
NEW EdgeCore 7712-32X-O-48V-B AS7712-32X 32x 100GB QSFP28 B-F Air (DC) Switch
SKU: NSN-8768
Condition: New
Shipping: Overnight Options
Warranty: 365 days
Extreme 17350 X690-48x-2q-4c 48x 10GB SFP+ 2x 40GB QSFP+ 4x 100GB QSFP28 Switch
SKU: NSB-4638
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
Arista DCS-7280SR3K-48YC8-F 48x 25GB SFP28 8x 100GB QSFP28 F-B Air Switch Router
SKU: NSB-9427
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
NEW Nvidia Mellanox MFA1A00-C030 30m 100GB QSFP28 Active Optical Cable
SKU: NSN-8620
Condition: New
Shipping: Overnight Options
Warranty: 365 days
Ruckus ICX7550-24F ICX 7550 Series 24x 10GB SFP+ 2x 100GB QSFP28 Switch
SKU: NSB-7419
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days