Your search for "MMA1B00-E100" revealed the following:

Nvidia Mellanox MMA1B00-E100 100GB BASE-SR4 850nm MMF MPO QSFP28 Transceiver

SKU: NSB-3083
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days

NEW Mellanox MMA1B00-E100 100GB BASE-SR4 850nm MMF MPO QSFP28 Transceiver

SKU: NSN-8606
Condition: New
Shipping: Overnight Options
Warranty: 365 days