Vaper 19952 5 inch x 2-3/4 inch Flexible Sanding Block features a flexible foam sanding block which is 5 inch x 2-3/4 inch (135 x 70 millimeter) sanding surface. It has a soft molded foam block for maximum comfort and grip. It is made of tough, durable polyurethane. It is for use on flat or contoured surfaces.