Xianghe Chengda measure instrument Facory was founded in 1990, with long history and high technics, specializes in all kinds of weights. It is one of the earlier manufacturers producing weights in China, our products is popular at home and abroad. And it mainly includes weights class e2, class f1 and international recommended weights unit KG, g and mg. The material of weights is jf-1 nonmagnetic stainless steel that is developed by China institute of metrology, metallurgy department of national institute of steel and us, and density of the jf-1 steel is 8. 000g / cm3. Weights class e2, used jf-1 steel. We also apply material of 1cr18ni9ti stainless steel to weighs of class f1, f2, m1, m2 and unit KG, g, mg, weight pieces, annular weights and incremental weights. All of our products are collocated with delicate box.