Draper 74697 100 x 25 x 12mm Silicone Carbide Sharpening Stone

Draper-200-X-50-X-25mm-Silicone-Carbide-Sharpening-Stone-Draper-74697-p-A-range-of-silicon-carbide-stones-with-combination-fine-and-medium-sharpening-surfaces-Display-packed-p-Draper-74697-100-x-25-x-12mm-Silicone-Carbide-Sharpening-Stone

Price: 4.45 from Rapid Online Rapid Electronics Ltd.