Premium Plus is preferred by professional painters because it is well suited for a wide variety of applications. It can be used on water based paints, as well as wood, metal, fiberglass, and painted surfaces. The premium resin coating resists heat and humidity for longer life. The heavy-duty paper backing is extra flexible for hand sanding and resists tearing and it folds easily without cracking. 3 sheets, 9" x 11". Carded.