3 inch x 6 inch sheets of Micro-Mesh® Ultra-Flex Cushioned abrasive laminated to LOOP backing. We offer these sheets in Micro-Mesh® REGULAR grades: 1000, 1500, 1800, 2400, 3200, 3600, 4000, 6000, 7000, 8000 and 12000. Individual sheets can be purchased or choose the variety pack which gives you 1 sheet of each of the 11 grades and a 3 inch x 4 inch foam sanding block with hook facing in which to attach your sheets to.