Changzhou Wujin Sunan Bearing Co., Ltd., also known as Wujin Sunan Steel Balls Factory, is a manufacturer based in Changzhou, China, specializing in steel balls and spherical bearing units. Established in 1989, the company employs between 11 and 50 people and operates a factory with nearly 200 production equipment. They are certified with ISO 14001, ISO9002, and ISO14001, demonstrating a commitment to quality and environmental management. Their product portfolio includes a wide range of steel balls such as carbon steel balls (0.5-150 m/m), stainless steel balls (0.8-80 m/m), chrome steel balls, brass balls, copper balls, grinding balls, polishing balls, and high precision glass balls. They also produce spherical bearings, eccentric sleeves, and adapter sleeves, including SN brand stainless steel and chrome steel spherical units (UC, UCX, UK, HC, SB, SA, SC, SER, UOOO, KOOO). The company offers custom specifications for various special stainless steel, copper, and ceramic balls. With advanced manufacturing capabilities, including large-scale CNC boring and milling machines, Changzhou Wujin Sunan Bearing Co., Ltd. provides high-quality components for bearings and bicycles to a global customer base.