Run-lion company main production "hill" brand O ring, and oil seal, and four fluoride products (PTFE), and the rubber parts, series; common elastic body material including: Kalrez-FFKM (full fluoride ether), and Viton (Viton), and EPDM, and VMQ (silicone rubber), and NBR (acrylonitrile-rubber), HNBR, CR, FVMQ, and PU rubber material.