Stock bore sprocket for roller chains 05B(PITCH-8MM), 05B(PITCH-8MM), 06B(PITCH-9.525MM), 081 (PITCH-12.70MM), 083/084 (PITCH-12.70MM), 08B (PITCH-12.70MM), 10B (PITCH-15.875MM), 12B (PITCH-19.05MM), 16B (PITCH-25.4MM),  20B(PITCH-31.75MM),  24B (PITCH-38.1MM),  28B (PITCH-44.45MM),  32B (PITCH-50.80MM), HUBS dimenssion welded with simplex sprocket , HUBS dimenssion welded with duplex sprocket , HUBS dimenssion welded with triplex sprocket