Do it Zip Sander Interior Paint Hand Sanding Kit includes a quick change foam block designed with a hook and loop holding system for easy sanding. This kit comes with assorted grit refill sheets for interior drywall projects, featuring grits of 80, 120, and 180. The sanding block measures 5 inches in length and 2-5/8 inches in width, and the package contains 12 sheets. It is conveniently packaged with a hang tag for easy display and storage. Model Number: 302289