http://tinyurl.com/pl38j3y
Oregon 75-803 Replacement Belt for John Deere M154621, 1/2-inch x 144-1/4-inchProduct Review
Click on the link for more reviews
Replaces John Deere part number M154621
Measures 1/2-inch by 144-1/4-inches
Deck drive S300 and X304 models 42C deck