1.material:pure ptfe thin yarn fiber,dimensional stability 2.we have an advantage of the pirce, ... it is made by braiding expanded ptfe strips.2. Ptfe fiber packing has low friction coefficient, abrasion-resistance, corrosion-resistance, good ... :. We can supply pure f4 fiber packing, high class 4.carbon fiber packing, single winding carbon fiber packing, carbon fiber graphite braided packing, graphite ...