· Structure. Moulded polyurethane foam with a metal insert. · Padding. Differentiated-density polyurethane foam for the greater comfort zone and polyester wadding quilt. President, Executive, Managerial, Meeting: 5-spokes base. Visitor: 4-spokes base with plastic swivel glides. - Aluminium in a black finish Supports (excluding Visitor chair). - Soft, self-braking “W” type castors · Upholstery. In Pelle Frau® ColorSphere® (SC) leather, also in the version with micro-perforated leather: - ColorSphere® (SC) / ColorSphere® (SC) micro-perforated (applied to the internal surface of seat, armrests and backrest). To verify the available fabrics please consult the dedicated table “Combination models-fabris pattern” C.O.M. (Fabric/Mt. plain – Fabric/Mt. repeat) President 3.0mt – 3.3mt Executive 2.6mt – 2.9mt Meeting 2.5mt – 2.8mt Managerial 2.5mt – 2.8mt Visitor 2.5mt – 2.8mt · Removability. Not possible. · Aesthetic details. The upholstery is embellished with tone-on-tone stitching.