These tailgates are stamped for the 48-60 Narrow high side boxes with an inside measurement of 49'' (tailgate 50 3/8'' x 21 1/4'' ) They are a very good quality part made 16 gauge steel. We call this the narrow high side because Dodge made two different high side width boxes 49'' or 54''. And the years used were over lapped. So check your truck before ordering. We also have the 54'' tailgate which is part number #BP-214-5180W .