Geodesic, 36mm and 85mm diameter. Now a full hemisfere, just print 2 times.Resize it to make bigger. Add a lamp or leds inside. Print or paint the pieces in different colors. Easy to print, 1 plate the small and 2 plates the big. You can help me to do more things like this. Buy my designs at pinshape:http://pinshape.com/users/27920-jsirgado The OpenSCAD file is there, you can change all.Created with OpenSCAD - Open source programmable CAD. You can change all parameters and create your own geodesic object. Mounting (parts): 1 pentagon at top. 5 hexagons in ring around the pentagon on top. 5 pentagons between the hexagons of ring. 5 hexagons between the pentagons above. Glue all.Mounting (hemispheres): Make 2 of them and glue the 2 hemispheres together.