Your search for "100g-qsfp28-sr4" revealed the following:
NEW Extreme 100G-QSFP28-SR4 100GB BASE-SR4 850nm MMF QSFP28 Transceiver
SKU: NSN-6993
Condition: New
Shipping: Overnight Options
Warranty: 365 days
NEW Juniper QSFP-100GBASE-SR4 100GB BASE-SR4 850nm MMF QSFP28 Transceiver
SKU: NSN-4077
Condition: New
Shipping: Overnight Options
Warranty: 365 days
NEW Arista QSFP-100G-LR4 100GB BASE-LR4 1310nm SMF LC QSFP28 Transceiver
SKU: NSN-5317
Condition: New
Shipping: Overnight Options
Warranty: 365 days
Extreme 10401 100GB BASE-SR4 850nm MMF MPO QSFP28 Transceiver
SKU: NSB-5517
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
NEW Arista AOC-Q-Q-100G-10M 10m 100GB QSFP28 Active Optical Cable
SKU: NSN-5326
Condition: New
Shipping: Overnight Options
Warranty: 365 days
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
Arista QSFP-100G-ERL4 100GBASE-ERL4 30-40km SMF Transceiver QSFP28
SKU: NSH-9088
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
NEW Arista AOC-Q-Q-100G-1M 1m 100GB QSFP28 Active Optical Cable
SKU: NSN-6738
Condition: New
Shipping: Overnight Options
Warranty: 365 days
NEW Arista QSFP-100G-SWDM4 100GB BASE-SWDM4 70m OM3/100m Duplex MMF QSFP28
SKU: NSN-0315
Condition: New
Shipping: Overnight Options
Warranty: 365 days
NEW Extreme 10401 100GB BASE-SR4 850nm MMF MPO QSFP28 Transceiver
SKU: NSN-6160
Condition: New
Shipping: Overnight Options
Warranty: 365 days