This is a NOS door window reveal molding.  It is the LEFT HAND side and it is for 1978-1980 Monte Carlo.  It might fit other years or models, that is up to you to determine if it will from the part number.  It is GM part number 20073158.  This is a chrome and black molding.  It is new old stock but it has been stored for years.  The molding has pieces of the original package as shown.  This molding WILL NEED TO BE CLEANED UP.  It could have light scratches, scuffs and or discolorations from storage.  You get the actual item pictured so please look at all photos and ask any questions before purchase.