It is widely used in the whole industrial field The metal skeleton assembly in the cavity is particularly stable and accurate (note: static sealing between the outer edges of the metal skeleton is limited when sealing low viscosity media and gases). With dust â?? proof lip, prevent general and medium dust pollution and external dirt invasion. Product Advantages The Oil Seals TB is widely used throughout the industry. The standard rotary shaft seal has a metal case and a rubber spring seal lip. In addition, the air edge of the Oil Seals TB has a protective lip. The metal frame assembly is particularly robust and accurate within the chamber (Note: static sealing between the outer edges of the metal frame is limited when sealing low-viscosity media and gaseous states.) With dust lip, to prevent general and medium dust pollution and the invasion of external dirt.