Zhuji City Conqueror brass cartridge Co., Ltd.(previous company: Zhuji City Chengning Valve Core Co., Ltd.), was set up in 2000, is a professional manufacturer of research and development quick open brass cartridge, brass valve cores, plumbing fittings, bathroom accessories and other products. The registered brand is "CHENGNING". Over the past decade, we continue to inport professionals and improve technology. At present, we have established a high-tech professionals team and master the core ...