Penny Black-Slapstick Cling Rubber Stamps. Penny Black stamps feature high-quality images in red rubber with a 1/8 inch foam pad for maximum transfer. Stamps are available in a wide variety of themes and designs for every day and every occasion! This package contains Hydrangea: one cling rubber stamp on one 7-1/2x4 inch backing sheet. Imported. Delivery Time : 2-3 Business Days!