Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE table_20790 ( "product" text, "dimensions (mm)" text, "dpi" real, "pages per minute (color)" real, "max page size" text, "interface" text )

### Question ###
What are the mm dimensions of the Plustek Mobileoffice D28 Corporate?

### Accurate SQL ###

SELECT "dimensions (mm)" FROM table_20790 WHERE "product" = 'Plustek MobileOffice D28 Corporate'