CREATE TABLE table_20790 ("product" TEXT, "dimensions  ( mm ) " TEXT, "dpi" FLOAT, "pages per minute  ( color ) " FLOAT, "max page size" TEXT, "interface" TEXT)

What are the mm dimensions of the Plustek Mobileoffice D28 Corporate?
SELECT "dimensions (mm)" FROM table_20790 WHERE "product" = 'Plustek MobileOffice D28 Corporate'
SELECT "dimensions (mm)" FROM "table_20790" WHERE "product" = 'Plustek MobileOffice D28 Corporate'