Chair with aluminum swivel trestle base on glides. Seat with built-in self-tensioning weight response mechanism, backrest with 3-position recline, adjustable lumbar support breathing up to 2 3/8". Medium back and seat completely upholstered in leather, customer's leather, coated fabric, fabric or customer's fabric. Fixed or 2D adjustable armrests in nylon fiber are available upon request and with a surcharge. Back and seat can be ordered in different colors of the same upholstery, with a surcharge.