Engineering thermoplastics have developed into a major and still growing family of raw materials, which demonstrate in-place benefits and have proved themselves cost-effective in operation. The benefits compared with metal include high strength-to-weight ratios, good corrosion resistance, electrical and thermal properties and low co-efficients of friction. PTFE is a tough, flexible engineering thermoplastic with outstanding electrical and chemical resistance. It is stable from -250°C to 250°C. Incredible strength and almost chemically inert PTFE also has the lowest co-efficient of static and dynamic friction of any known solid.