Zhejiang Jiacheng New Material Co., Ltd.(Later named SJK Corporation) was founded in 1994. It focuses on manufacturing professional rubber seal products, and providing seal technology application solutions over 20 years. The concept of SJK are keeping initiative and pragmatic spirit, maintaining the stability of product quality, and keeping constant pursuit.

SJK's main products are , ED ring, rubber gasket, rubber cord, and other standard seal products, as well as customized products. Meanwhile, SJK provides professional solutions of raw materials' application, development, and sales.