The ProDuster quickly and easily dusts over cluttered desks, blinds, computers, electronic equipment and even plants. These ProDusters are sold in a pack of 500 and are safe for any surface, contains no oils or waxes, and won't streak or leave any residue. ProDuster sleeves fit over most wand wool or feather dusters and generate their own dust attracting properties that collect and hold dust and dirt particles. The sleeves will prolong the life of your wool duster, making them much more economical to replace than the entire duster. Case dimensions: 18.625"x8"x14.75"