These are used on automotive engines and geared motors primarily to prevent oil leaks at the ends of rotating shafts and the intrusion of dust particles from outside.

Xingtai Qingshan（STO） Sealing Co., ltd, specialized in producing other rubber sealing products since 1996, located in Xingtai city ,the largest sealing products base in China.

Xingtai Qingshan（STO） Sealing Co., Ltd, specialized in producing other rubber sealing products since 1996, located in Xingtai city, the largest sealing products based in China