Stackable chair with steel tube arms Uli 331-R has a solid oakwood frame and an upholstered curved trapezoidal backrest in oak plywood, both steel and wooden elements can be customized with all stains and lacquers visible in this file and in the Finishes section of our website or with sample colours, the slim bent seat is upholstered, customers can choose among COM or fabrics and materials from the Finishes section of our website.