... Drawing Glass Fiber Filled PTFE (Teflon) Sleeves / Tubes, Glass Fiber percentage can be made according to customers' request, for example 5% / 20% / 10%, etc.Glass Fiber Filled ... many different kinds. Amongest the many fillers suitable for compounding with PTFE, glass fiber, carbon fiber, beronze and also lubricating materials like graphite, molybdenum ...