Ceramic Balls, Ceramic Bearings, Thin Section Bearings manufacturer / supplier in China, offering High Quality G5 G10 6mm Si3n4 Structural Zirconia Ceramic Silicon Nitride Ball Deep Groove/Angular Contact/Thrust/Self-Aligning/Insert Ball Bearing, Boat Rowing Seat Wheel, Sliding Door Roller Wheel, Plastic Roller Wheel Rubber Coated Rollers Bearings Wheel PU608, 7/32"X8 Carbon Steel Ball Retainer for Bicycle Parts and so on.