Premium aluminum oxide.Stearate coating and open coat structure lubricates and prevents loading.Long lasting performance and fast removal rates for fine finishing of automotive body works and wood finishing.Use dry only.C-weight paper backing ????????????medium weight, medium flexibility., Resin over resin construction for a strong bond that is resistant to heat and moisture.Box label UPC bar coded for easy identification and inventory maintenance.Our highest quality industrial paper for extra durability on all applications.Broad assortment of grit sizes for a wide range of sanding and finishing applications.