CAZ NAB 420 Non-asbestos beater sheet is made from synthetic emulsion, plants fiber and filling material. The production is used for position of lubrication system, which has the property of good compressibility and coefficient of resilience, in addition, the inside of gasket can properly swell to meet oil, that make up of the shortcoming that procession machining precision is not enough, which affected self-sealing. Style 420V is Vulcanized non-asbestos beater sheet with smooth faces.