Your search for "QSFP28" revealed the following:
Arista QSFP-100G-PSM4 100GB BASE-PSM4 1310nm DOM MTP/MPO SMF QSFP28 Transceiver
SKU: NSB-5279
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
$ 48.99
• Only 2 remaining
Call if you need more
Extreme EC8404009-E6 VSP 8400 Series 8402CQ 2x 100GB QSFP28 Switch Module
SKU: NSH-8563
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
$ 4,382.99
• Only 1 remaining
Call if you need more
nVidia Mellanox MCX556A-ECAT ConnectX-5 2x 100GB QSFP28 PCIe 3.0 x16 NIC
SKU: NSB-8858
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
$ 366.99
• Only 2 remaining
Call if you need more
Juniper QFX5120-48Y-AFO 48x 25GB SFP28 8x 100GB QSFP28 F-B Air Switch
SKU: NSH-8249
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
$ 11,244.99
• Only 2 remaining
Call if you need more
Nvidia Mellanox MCP1600-C00AE30N 0.5m 100GB QSFP28 Direct Attach Copper Cable
SKU: NSB-2904
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
$ 192.99
• 35 in stock
Call if you need more
HPE Q2F21A SN2700M M-Series 32x 100 Gigabit QSFP28 SAN Switch
SKU: NSB-8914
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
$ 7,762.99
• Only 1 remaining
Call if you need more
Cisco N3K-C3264C-E 64x 100GB QSFP28 2x 1GB SFP Back-to-Front Airflow Switch
SKU: NSH-8363
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
$ 969.99
• Only 2 remaining
Call if you need more
Cisco QSFP-100G-AOC5M 5m 100GB QSFP28 Active Optical Cable
SKU: NSH-8882
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
$ 98.99
• 46 in stock
Call if you need more
Cisco Meraki MS450-12-HW 12x 40GB QSFP+ 2x 100GB QSFP28 Unclaimed Switch
SKU: NSH-9919
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
$ 1,739.99
• Only 2 remaining
Call if you need more
Arista CAB-Q-4S-100G-5M 5m 100GB QSFP28 to 4x 25GB SFP Breakout Cable
SKU: NSB-5256
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
$ 197.99
• 7 in stock
Call if you need more