Due to this Puzzle being crafted as a limited edition or run, it is no longer available for sale. Regrettably we do not think it will be back in stock. Please view our other hard to find puzzles on our Karakuri Trick Box Page. *Difficulty-Moderate to Difficult Quite tricky to open. Limited Edition Puzzle Box comes with opening instructions and Gift Box! Measures approximately* 4.75 x 3.5 x 2.3 inches Constructed with some MDF. High quality urethane finish. Stamped with Oka-san's hanko.