10 through 13 Tooth 10mm Double D-Bore Sprocket 8.6mm x 10.1mm ID. Fits 10mm OD dual-flatted motor shafts with nut and washer on end to secure sprocket in place. Made from hardened steel with a black oxide finish.
Compatibility
FITS: EC4P (Double D-Bore Shaft) and MY1020 style motors
NOTE: DOES NOT fit E&C Spline Shaft. Refer to product photo to identify your shaft correctly! No Returns!