Our SB14 is a soft, natural Arkansas stone measuring 3x1x3/8″.  Natural Arkansas stones have gained a reputation over the years as the finest all-purpose stones for deburring and polishing operations as well as for sharpening precision tools. Soft Arkansas Stones are an extra-fine grit with a more open, less dense structure, ideal for imparting a fine, smooth surface. These stones are not oil-filled and should be used with Gesswein Stoning Oil.  Can be used on both sides.