Schlagwerk CAJONGA (Schlagwerk Cajonga) Purchased approximately 20 years ago, I used it several times for concerts and recordings. However, since I am not a percussionist, I didn't use it that much. The playing surface is clean because I didn't put it in a case when carrying it, but there are many scratches of various sizes around the body. There are no major scratches that affect the performance. There is some age-related dullness. I don't have detailed information about the instrument. The front label and the label inside say "klangobjekte," so it may be a collaboration product with klangobjekte. As far as I have researched, I couldn't find out for sure. I think it's a rare item that you don't see very often. Here is a website with a catalog for reference: https://images.thomann.de/pics/prod/schlagwerk_cajon.pdf Measurements taken by myself: Playing surface: 21cm x 21cm Height: 61cm (including rubber feet) All three are the same size, but the pitch of each is different. The pitch is not clear, but the top and bottom are about one octave apart. The middle one is about in the middle of the octave. Velcro was attached to the body from the time of purchase, so the three can be attached together. Each one has four rubber feet on the bottom, so the body is slightly raised from the floor. Currently, I plan to ship it in one package.