The Dynabrade DYB57850 is a high-quality vinyl-faced sanding block with a width of 3-2/3 inches and a length of 7 inches. It has a thickness of 3/8 inch, making it durable and suitable for various sanding tasks. The Dynabrade brand ensures reliability and performance in the automotive tools and supplies industry, making this sanding block a valuable addition to any workshop or garage.