I made these maquettes by 9mm x 9mm stainless square pipes. Usually the pipes you can get are not polished inside. I use many tools such as sandpaper, a file in order to polish inside. It takes a lot of time to make these. Some of them are sold out so please wait for about 7 - 8 weeks until I make the same one if you'd like to purchase it. Please simply contact me by e-mail or fax if you consider purchasing.