Natural (light tan to brown) This grade is composed of a continuous cotton woven cloth impregnated with a phenolic resin binder. This grade contains a medium weave cotton fabric and is known primarily for it's mechanical properties. This grade is not recommended for primary insulation. Our Grades are CPF 103. Apllication for Bearings and Bushes, Bearing Housing, Gears, Rollers for Cable Industries, Back Up Ring for Packing and Mecahnical Components.