Located in Lai zhou, a beautiful city in Shandong Province,Laizhou Huayu Zhongxin Test Instrument Co., Ltd. is a professional company devoted to research, development, manufacturering and sales of metal and nonmetal durometers. As one of the few bases that set foot in the targeted research, development and manufacturering of durometers in the early days in China, it hs been into this field for more than 60 years. It produces over 10,000 durometers covering 9 series and more than 50 varieties and specifications, more than 100,000 hardness test blocks of different standards……