This custom made oak threshold unfinished but finish sanded ready for your finish., measures 48 inch long 6 inch wide 1  inch thick tapered to 1/4 inch thick  made for wheel chairs to get over uneven floors also as a floor transition . I can make for any size doorway just send me measurements  thanks houze wood shop   PS THEY USUALLY HAVE NO KNOTS IN THEM, LAST PICTURE ARE COLORS I HAVE   I HAVE CUSTOM WOOD SHOP I MAKE THESE AND CUSTOM SIZE YOU NEED   SEARCH  HOUZE WOOD SHOP ON THE NET ☺   thanks john houze