HAMPTON ART-Diffusion Cling Stamps. Hampton Art offers premium quality rubber stamps in a wide variety of images and themes to match any and every project or design style. Each stamp is mounted on 1/8-inch thick cling foam and can be used with any acrylic block. This package contains an assortment of cling rubber stamps on an 8x4 inch backing sheet. Available in a variety of design sets (each sold separately). Number of stamps per package varies by set. Imported.