There are 15 puzzle pieces and 4 connector rings for the legs.
The average weight of the 19 pieces is 85 grams, so 1,5kg filament of each color should be more than enough to build one chair.
The pieces should be printed with 2.85mm ABS and the printer settings can be found in the manual included in the download.
The legs are made from standard broomsticks.
The custom Joris Laarman Lab colors can be bought here. You need 2 spools of 0,75 kg of each color.
Feel free to experiment with your own printer and settings, but remember that you are responsible for your print. Make sure your pieces are strong enough to withstand some force and make safety your number one priority!