Mechatronics Fan Group UF12A12/23-BWHR suffix

Mechatronics fan part number UF12A12/23-BWHR. DigiKey part number 1570-1008-ND

The R suffix calls out RoHS Compliant.
Data sheet link: Mechatronics AC Axial Fans Part Numbering System

Snip from the Data sheet: