Your search for "QSFP28" revealed the following:

Juniper QFX5210-64C-AFO QFX5210 Series 64x 100GB QSFP28 F-B Airflow Switch

SKU: NSH-8261
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days

NEW Dell S4112T-ON-RA 12x 10GB Copper 3x 100GB QSFP28 B-F AC (No OS10) Switch

SKU: NSN-9955
Condition: New
Shipping: Overnight Options
Warranty: 365 days

NEW Mellanox MFA1A00-C005 5m 100GB QSFP28 Active Optical Cable

SKU: NSN-8986
Condition: New
Shipping: Overnight Options
Warranty: 365 days

NEW Arista DCS-7500R2A-36CQ-LC 7500R Series 36x 100GB QSFP28 Switch Line Card

SKU: NSN-9200
Condition: New
Shipping: Overnight Options
Warranty: 365 days

Cisco N540-24Z8Q2C-M 24x 10GB SFP+ 8x 25GB SFP28 2x 100GB QSFP28 Router

SKU: NSB-8196
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days

Dell S4112T-ON-RA 12x 10GB Copper 3x 100GB QSFP28 B-F Air DC OS10 Switch

SKU: NSB-1989
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days

NEW Dell S4148FE-ON 48x 10GB SFP+ 2x 40GB QSFP+ 4x QSFP28 F-B Air OS10 Switch

SKU: NSN-1909
Condition: New
Shipping: Overnight Options
Warranty: 365 days

NEW Nvidia Mellanox MSN2100-CB2F 16x 100GB QSFP28 B-F (P2C) Onyx Switch

SKU: NSN-0070
Condition: New
Shipping: Overnight Options
Warranty: 365 days

NEW Mellanox MFA1A00-C010 10m 100GB QSFP28 Active Optical Cable

SKU: NSN-8616
Condition: New
Shipping: Overnight Options
Warranty: 365 days

NEW Juniper MPC7E-MRATE-RB MX2000 Series 12x 100GB QSFP28 Router Line Card

SKU: NSN-3529
Condition: New
Shipping: Overnight Options
Warranty: 365 days