These single and double kendama holders mount to the wall for a simple way to display or store your collection. Able to hold any standard sized kendama from either big or little cup. These are intended to be mounted using a screw so they don't easily rotate when used, but a nail would work for the single kendama holder as well.I was able to produce good prints on a PrintrBot Simple 1405 using the following settings in Slic3r: Layer Height: 0.2 Perimeters: 2 Top Solid Layers: 5 Bottom Solid Layers: 2 Infill: 10%