Hero Arts-Cling Stamps. These Clings are repositionable stamps backed with a special material that uses static cling to stick securely to acrylic blocks for clean easy stamping. Each one is hand made with 100% all-natural rubber that is latex free phthalate free non-toxic and biodegradable. This package contains Leafy Vines: one cling rubber stamp on a 13cm x 17cm backing sheet. Made in USA.