Your search for "QSFP-100G-XSR4" revealed the following:
Arista QSFP-100G-XSR4 100GBASE-XSR4 850nm 300m OM4 DOM QSFP28 Transceiver
SKU: NSB-5275
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
$ 587.99
• Only 2 remaining
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NEW Arista QSFP-100G-XSR4 100GBASE-XSR4 150m Parallel OM3/300m OM4 MMF QSFP28
SKU: NSN-6739
Condition: New
Shipping: Overnight Options
Warranty: 365 days