These are the leftovers from my child playing with them. Genuine and compatible parts are mixed. (They can be used in the same way, but there may be some defective shapes in the compatible parts, so please remove them before use.) I don't know how many there are, but there seem to be a lot left. The envelope in the picture is Kakuni No. 2 size. I will protect them with bubble wrap and ship them. Please forgive me if the case cracks during transportation... m(_ _)m