RPMs is a set of three, hand-designed art stamps by Seth Apter for Impression Obsession. Made in the USA, these stamps are deeply etched, red rubber that is backed with repositionable cling cushion. RPMs includes the following three stamps: Lunar Landing, Wonder, Concentric. The three stamps measure between 2 in. and 2.5 in. in diameter. These stamps are perfect for mixed media art, art journaling, card making and scrapbooking.