Every part connects two sheets with the other two sheets forming part of the seating and part of the leg connection. Between the parts are bolted anti slippery rubber slips. All the metal parts are sandblasted and powder coated. Powder coating is transparent glossy but later chairs feature different coloured coatings.
The ergonomic structural stiffness is linked to the geometry of the chair and the slight fold of the edge.
The final A chair, has been baptized as the 5 o'clock version - linking to the angle between the two legs, affecting the structural performance of the chair.