Dodge High Torque Belt Sprocket, Type B1F, Series: HT250, Taper-Lock Bore Type, 1/2 to 2-11/16 in Bore Dia, 6.362 in Outside Dia, 6.416 in, 64 Grooves, 8 mm Pitch, 1-1/2 in Face Width, 6.772 in Flange Dia, 1/4 in Hub Projection, 2517 Bushing Positive and non-slip driveNo lubrication requiredNon-stretchCorrosion resistantAbrasion resistantVirtually no backlashLong lifeLow maintenance