This is a Dia Block called J. Fighter. It was previously distributed to children on JAL flights. There are four types in total. Unit 1 is Mars (red), Unit 2 is Mercury (blue), Unit 3 is Moon (yellow), and Unit 4 is Jupiter (black). I am selling a set of two Unit 3 Moon blocks. There are no missing parts, but there are some peeling stickers, stains, and scratches. Please purchase only if you understand this.