Medium weave cotton/phenolic resin laminated plastic(SRBF - Synthetic resin Bonded Fabric) A low cost general purpose grade for mechanical applications.Crow Brand TUFNOL is a coarse weave grade for mechanical applications, where tough, rugged components are needed. It has excellent impact strength with good general toughness and wear resistance. It is suitable for electrical insulation at low voltages. What is Crow Brand used for?Crow Brand is used for mechanical applications and general uses, particularly for large components, or where fine surface finish is not a prime requirement, e.g. for large gears, jigs, wearing components, large rollers, impact blocks and many heavy duty components.