20% Glass Fiber Filled PTFE Sleeves Materials: glass fiber + PTFE (Teflon) Method: Press Molding Shape: by Drawing Glass Fiber Filled PTFE (Teflon) Sleeves / Tubes, Glass Fiber percentage can be made according to ... different kinds. Amongest the many fillers suitable for compounding with PTFE, glass fiber, carbon fiber, beronze and also lubricating materials like graphite, molybdenum disulphide ...