You must have: - abs parts normal and mirror - 1 xcarriagedouble - 2 small gears - 2 big gears - 2 M5 2cm - 2 Drive gear (3mm) - 4 bearings 605 - 2 bearing 624 - 2 M4 1.4 cm ..- 2 j-head or compatible.. also compatible with budaschnozzle info and photo instruction on: http://3dita.falaschi.com/2013/05/double-miniestruder-fala-i3-montaggio.htmlhaveFun!