Shanghai Hengyu Instrument Co., Ltd. was founded in 2005 and is a high-tech joint venture enterprise that integrates research and development, service, and manufacturing of various quality control precision testing instruments. Main products: Silicone open mill, large open mill, experimental open mill, open mill, small open mill, Shanghai open mill, flat vulcanizing machine, tablet press, sulfur analyzer (vulcanizing instrument), Mooney viscosity analyzer (Mooney apparatus), tensile testing machine and other products.