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. The first compartment is easy but the second opening is so VERY complex to find! Opens in 21 steps by shifting kannuki on the INSIDE! Measures* 5.875 x 3.875 x 3.125 inches