Prusa Mendel Iteration 2 is a simpler remix of normal Mendel. It is an improvement of the Prusa Mendel (iteration 1) and was released in November 2011. The following is a list of the main improvements made on the original Prusa: 1. More parts are made to be push-fit 2. The carriages accommodate bushings and linear bearings 3. Nut traps were added to parts that were attached with M3 screws (e.g. endstop holders etc.) 4. The second bed plate was removed (The PCB heatbed is the second plate) 5. The belts were changed to GT5 belts - it is recommended to buy professional belt pulleys 6. Most M4 screws were changed to M3s 7. A printed plastic belt guide is replaced with the large M8x30 fender washers 8. The belt clamp was redesigned Features: 1.Printing area: 200x200x100mm 2.New designed hotend version 2.0 with 2pcs nozzle one is you choose and other one we will send you free for spare(the size is random) easy to disassemble and clean. 3.Perfect extruder with more durable X-carriage printed from 1.75/3mm ABS/PLA filament. 4.Universal Arylic controller board support plate makes your controller board selectable. Melzi Ardentissimo Teensylu 0.8Sanguinololu v1.3aRamps 1.4Generation 6 Printerboard rev DBrainwave and Azteeg X1 to choose from. 5.Come with super smooth Borosilicate glass easy to remove printing parts print toys with flat bottom. 6.New stepper motors Nema17large torque to print smoothly avoid mistakes caused by friction. 7.Ultra smooth Z movement and couplings with revised X-end-idler. 8. Power supply S-350-12 12V 29A DC included.