Musashi Oil Seal Mfg. Co., Ltd. and CHK Sealing Technology Co., Ltd. was set up in 1993 by general manager Chen Yi-chang and his team,we have over 20 years’ experience in making valve stem seals and oil seals. Continually improving and modifying products, we’ve also automated production equipment, turning out UKAS ISO 9001-2000 certified, quality-approved items. Selling products for cars, PTWs, and heavy-duty vehicles globally under the MUSASHI, CHK and WOK brands, we offer high quality of products at best competitive prices and soonest lead-time for customors delivered with specialized fabrication and service.