We built the kit of Prusa model i3 MK3s in about 12 hours, which is currently the best 3D printer available on the market.

The kit is ideal for learning how a 3D printer works. Josef Prusa modified the original Open Source RepRap design (Replicating Rapid Prototyper) where the plastic pieces of the 3D printer to be built are printed by another 3D printer. At time of writing Prusa Research has supplied 130'000 printers worldwide and owns a printing farm with 1'000 3D printers.