About A Chair AAC 09 features an open frame in bent steel that adds lightness to the intuitive design. Its upright, yet rounded shell combines functional stackability with great comfort and an inviting expression. The open sled frame is available in stainless steel and powder coated finishes, while the shell comes in diverse colour and upholstery options, allowing a multitude of design combinations that make this series so versatile.Injection moulded polypropylene shell without armrest full upholstery.Shell thickness: 10 mm polypropylene with 10 mm foamSled base in Ø12 mm in solid steel.Available in a large selection of standard fabrics and leathersBase available in 3 different finishes:- White powder coated steel (RAL 9003)- Black powder coated steel (RAL 9005)- Brushed stainless steel (only on demand)