SJM was established in 1975 to solve heat expansion and vibration related problems in pipe systems. It is the largest technology oriented company in Korea that produces high quality bellows for the auto-industry, plants and buildings.

Based on its global network in Europe, Asia, Africa and North America, SJM is one of the world’s foremost companies for the design and manufacture of bellows. It is also expanding its business into IT and Communication to prepare itself for the digital world.