EST (Easterny Sealing Technology) was established in 2003, located in the world eastern-Ningbo China .We are specialized in manufacturing and supplying component and cartridge mechanical seals, which are both dimensionally and functionally equivalent to the popular seals from a variety of brand manufacturers. The range of EST mechanical seals includes various types and design available in a wide variety of combinations of material for comprehensive applications. In addition, customize mechanical seal repair kits and specific configurations are both available.