Pro Spur Sprocket / 3/8" LP Pitch, 6 TeethPack Size:1GB PA475-R6N, Herr 266-M6, Husqvarna 530 04 70-61, Oregon 41569X, Poulan 952-048115, Ref No SPA475-16NNHC 085-5097, Rotary 1603, Stens 085-509Jonsered 2035, 2036, 2040 AND 2041; Partner 350, 365 and 405; Poulan 255, 295, 2500, 2600, 2750, 2775, 2900, 3050, P600, PP210, PP295 and 2150Crank Diameter: 13/32 ", Drum ID: 2.500 ", Pitch: 3/8" LP, Teeth: 6, Bearing included