Hero Arts-Mini Stamp Tub By Lia: Letters. Hero Arts Wood-Mounted stamps are made with lightweight wood, foam and red rubber to give you solid stamping performance. With designs for the everyday and special occasions you are sure to find the perfect stamp. This package contains twenty-eight woodblock stamps and one 1x1 inch ink pad within one 3x2-1/2x2-1/2 inch tub. Conforms to ASTM D4236. Imported.