MTD 954-04032B Exact Replacement Belt Measures 3/8-Inch By 35.68-inch. Fits Models: MTD 400, 500 and 550 series self-propelled walk behinds, 1998 and older; and 550 series edges http://bestelectricmower.com is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising