Scotchbrite / Webrax / Scouring Fibral Abrasive Hand Pads: Scotchbrite / Webrax / Scouring Fibral Abrasive Hand Pads: Pack of 10 Green = 100Grit - General purpose Red = 320Grit - Fine Grey = 600Grit - Very Fine White =No Grit - Very Very Fine - Polishing Pad - Good for Glass 152mm x 229mm Nonwoven products are manufactured in a continuous treatment process in which the basic fibres are carded, coated and needled to form the base material. In stage two of the process, a mixture of binder and abrasive grains is sprayed into this three-dimensional backing, so that it penetrates the non- woven base material. The grain inlays are distributed throughout the entire material thickness, so that more grains are exposed during its use. This results in constant performance throughout the entire lifetime of the product.