The cloth backed abrasive sheets can be torn down to the required size, if necessary. They comply with ISO 21948. Cloth backed abrasive sheets brown: Suitable for general heavy duty use on alloyed and non alloyed steels as well as non ferrous metals. Advantages: Very flexible cloth Very high grain adhesion High abrasive performance Oil and kerosene resistant Cloth backed abrasive sheets blue: Lower cost alternative for normal workloads when working on painted wooden and metal surfaces. Advantages: Strong cloth Good grain adhesion Good abrasive performance Ordering note for BG blue: Grit sizes 100, 120, 150, 180 and 220 are supplied in packaging units of 100 pieces