... of Hydraulic Rubber O-Ring :1. O-rings is the simplest parts in the field of seals, although ... efficient seals.2.The structure of sealing part is very simple,for this reason,it could be ... performance, but also for its mechanical performances, it is being used widely in drive strap, type, controlling equipment ... , oil seal and gas seal6. Unit price is depends on the material and the detailed design Others ...