"Illegal" is the name of this modular furniture. These Element can be used to build shelfs, sideboards, etc.. You need zip ties and 3mm steel bolts to put the modules together.Attribution goes to GEA, an austrian company which sells the elements: http://www.gea.at/rechts_egal.html I wanted to have the exact measures, so I did this file. The plan is to adapt this design to Lasercutable modules.