Magis - Stacking chair First - Black - Polypropylene - Designer Stefano Giovannoni; Magis Stacking chair Black Plastic material. Dimensions: L 50 cm x Depth 52 cm x H 77,5 cm x Seat H 46 cm. Design Stefano Giovannoni. This chair is made of polyamide with moulded-in colour, satin finish in the front and shiny in the back, but there are also versions that are treated with special lacquers. Chair First's name comes from it being the first example of a chair made by air moulding in which the emptying of the frame is not simply applied to the volumes with a small tubular section, but all throughout the extensive and complex volumes of the chair and its backrest.