Do it 9 x 11" Waterproof Assorted Fine Grit Sandpaper, 4-Pack is for wet sanding between coats of paint, sealers, varnish, and other finishes. This convenient pack contains four sheets with assorted fine grits: 220, 320, 440, and 600, providing a variety of options for achieving smooth, professional results. Crafted from durable silicon carbide, these sandpaper sheets feature a resin coating that lasts longer and performs ordinary glue bond sandpapers. Each sheet measures 9" x 11", making this assortment i for detailed and versatile finishing tasks. Model Number: 330140GA