Hangzhou Ruiwei Machinery Equipment Co., Ltd. is a professional sealing system supplier dedicated to the research, design and production of excavator oil seals, hydraulic breaker oil seals and oil seals of other construction machinery. The company’s own brands include BORISE, WECKERSEALS, etc., and it’s currently the seal supplier for most breaker brands in China. The company adopts German technology in R&D and production engineering, developed polyurethane oil seals of high-resilience and excellent wear resistance，and step seals of high wear resistance and tear resistance based on PPDI material, matching the various needs of construction machinery sealing.