Top left to right: Thin Lo-fric glide flat plates, circular/ bearing parts, 4 telescoping pillars, gears of different diametres and modules. Bottom left to right: Structural parts,2 gear racks, the two 4 mm axles w (incredibly lo-fric) rollers, More structural/ angled parts, and loads of tiny rollers below right. Just cut, drill to intendes uses. Half a kilo of this sturdy, lightweight and lo-fric plastic.