This is a Brand New starter ring gear for tractors. This is used on models 250, 253, 360, 65, 165, 175, 255, 275, 285, 290, 690, industrials 302, 304, 30, 40b, 50, 3165, all with the Perkins engine. Replaces part number 731008m1. Be sure to add me to your ! Thanks For Your Business!! 1209-9209/s40364