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)