Cover-a-Card Crackle Stamp by Seth Apter. This 5.75 in square, hand-designed art stamp is designed by Seth Apter for Impression Obsession, Inc. Deeply etched, red rubber that is backed with repositionable cling cushion; can be used with or without an acrylic block. The size of this grungy background stamp allows for wide coverage with every impression. These stamps are perfect for mixed media art, art journaling, card making and scrapbooking.