We keep 50 x 686 mm Sanding Belts in stock, and in a wide variety of Grades. They commence at 40 grit and go right through to A6/P2000 Grade Trizact. There are a variety of grains in stock suitable for a wide variety of applications. You can purchase them individually, or in quantities of 6 per grit for savings. So, if you need this size belts, just place your order online and we will see that it is shipped out to you in a timely manner.