These are decorations for mini Christmas trees, perfect for your desk. To assemble each pokeball you need 1 top, 1 bottom, 1 middle ring and 1 button. The top and bottom are the same .stl file so you have to print it once white for the bottom and once red for the top. There is an optional top with a hook so you can easily tie a string to it and hang it that way. The Staryu tree topper prints in two pieces and is glued together. All parts are scalable for bigger trees. I used Bambu Labs PLA Basic Red, White & Black and Gold Silk PLA for the Staryu.