non-asbestos gasket: made by sheets of TESNIT,KLINGER, High pressure paronite, middle pressureparonite, low pressure paronite, oil-proof paronite.using cutting machine and some process to make it flat non asbestos gasket. Product Feature : 1.cheap,easy use, good fuction enduring chemical, no pollution, very popular sealing products in the worldwild. 2.special sharp