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, Sino-Holding continue to rapidly grow through our exceptional investments and design development, headquartered in Beijing, have three modern factories in China. Through constant development of more than 10 years, We have formed mechanical seals, Encapsulated o-ring, Silicon carbide products,Wave springs products lines. ★ Standard Mechanical Seals We can provide a complete range of standard mechanical seals which could be equivalent to John crane, Eagle Burgmann, Flowserve, Roten, ANGA, AESSEAL, Latty, Roplan, Sealol a