TOPSUN INTERNATIONAL located in the Jiangsu Province, very near shanghai, which is an industrial & trading enterprise specialized in manufacturing tire valve .valve core, tire parts ,and other accessories . Our group have two factories main produce the tyre valves, The quality is pass the ISO9001:2000, ISO/TS16949, Over many years of developing, we had take big market share China. And also export to India , Russia ,USA, Vietnam ,Turkey , Brazil ,Italy , Spain . our valves main supplying to the inner tube OEM factory also.