Profile: Ningbo Bold Engineering Manufacturer & Trading Corporation specializes in designing and manufacturing comprehensive ranges of mechanical seals. We manufacture mechanical seals, sealing components, bearings and shafts. We offer various mechanical seals including elastomer bellow, spring, Teflon wedge, tungsten carbide, machinery, carbon graphite ring and aluminum oxide ceramic seals. We manufacture various bearings including deep groove ball, self-aligning, thrust ball, insert ball, miniature flanged ball and automobile bearings. We also produce a wide range of brass valves and fittings for all industries.