Stampendous-Cling Rubber Stamps. Premium quality precision trimmed rubber stamps that give you a beautiful image every time. Use with any acrylic block (sold separately). Simply remove the disposable acetate layer revealing the vinyl cling with printed image press onto a block align and stamp. Use any ink that can be used with traditional wood-mounted stamps and clean with wood-mounted stamp cleaner. This package contains Penned Birthday: one cling rubber stamp on one 3-1/2x4 inch backing sheet. Made in USA.