As a leading manufacturer of mechanical seals and sealing products in China, Sino-Holding Co., Ltd, with over two hundred staff, in our three factories, are specialized in designing, manufacturing and marketing mechanical seals and sealing products. Founded in 1999, SH continue to rapidly grow through our exceptional investments and design development, headquartered in Beijing, have three modern factories in ZheJiang Province. Through constant development of more than 10 years, We have formed the four main products lines, being: