These are the same premium quality precision trimmed rubber stamps as the Stampendous wood-mounted version. A piece of cling vinyl has replaced the wood on the adhesive side of the foam allowing the image to be used with an acrylic block. Simply remove the disposable acetate layer revealing the vinyl cling with printed image, press onto a block, align & stamp! Use any ink that can be used with traditional wood-mounted stamps & clean with wood-mounted stamp dauber cleaner. Their window cling quality makes storage in a Storage Solutions organizer quick & easy.