Your search for "qsfp28" revealed the following:

NEW Juniper QFX5200-48Y-AFI 48x 25GB SFP28 6x 100GB QSFP28 B-F Airflow Switch

SKU: NSN-3632
Condition: New
Shipping: Overnight Options
Warranty: 365 days

Juniper QFX10000-30C-M QFX 10000 Series 30x 100GB QSFP28 MACsec Switch Line Card

SKU: NSH-9971
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days

NEW Dell S4128T-ON-RA 28x 10GB 2x 100GB QSFP28 B-F Air 210-ALTI OS10 Switch

SKU: NSN-8122
Condition: New
Shipping: Overnight Options
Warranty: 365 days

NEW Juniper QFX5200-48Y-AFO 48x 25GB SFP28 6x 100GB QSFP28 F-B Air Switch

SKU: NSN-3538
Condition: New
Shipping: Overnight Options
Warranty: 365 days

NEW Dell S5248F-ON 48x 25GB SFP28 2x 200GB QSFP28-DD 4x 100GB QSFP28 F-B Switch

SKU: NSN-1910
Condition: New
Shipping: Overnight Options
Warranty: 365 days

Juniper QFX5200-48Y-AFI 48x 25GB SFP28 6x 100GB QSFP28 B-F Airflow Switch

SKU: NSH-8256
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days

NEW Cisco QSFP-100G-SM-SR 100GB BASE-CWDM4 1331nm Lite SMF QSFP28 Transceiver

SKU: NSN-2060
Condition: New
Shipping: Overnight Options
Warranty: 365 days

NEW Juniper QFX5200-48Y-DC-AFI 48x 25GB SFP28 6x 100GB QSFP28 B-F Air DC Switch

SKU: NSN-3633
Condition: New
Shipping: Overnight Options
Warranty: 365 days

NEW Dell S5248F-ON 48x 25GB SFP28 2x QSFP28-DD 4x QSFP28 F-B No OS10 Switch

SKU: NSN-9940
Condition: New
Shipping: Overnight Options
Warranty: 365 days

NEW Juniper QFX5200-48Y-DC-AFO 48x 25GB SFP28 6x 100GB QSFP28 F-B Air DC Switch

SKU: NSN-3634
Condition: New
Shipping: Overnight Options
Warranty: 365 days