Description: Silver Streak Pro Spur Sprocket 3/8" LP Pitch 6 Teeth Replaces OEM: (Please be sure of your OEM part number before purchase) N6-MC-644-SS, MC446-R60, MC446-R6N, N174M6, 215252, 29-888, 29888, SMC446-16N, Fits Models: 40, 500, 835AV, 2000, 2010, 2012, 2014, 2016, 2216, 2316, 2318, 3000, 3200, 3210, 3214, 3216, 3505, 3516, 3805, 3818, Mac 110-140, Mini Mac (all models), MM30, MS1432, MS1435, MS1838, PM310, PM320, PM330 and PM340 3516 Specs: Crank Diameter: .3937" Pitch: 3/8" LP Teeth: 6 Bearing included