Bertoia Diamond Chair by Harry Bertoia for Knoll. The base is constructed of welded steel rods with polished chrome and upholstered with cover attaches directly to the frame with hidden mono-filament and metal hooks. The Bertoia Diamond Chair combines strength and comfort for a lightweight design and absolutely essential. Bertoia himself defined it as "a real sculpture made of air and steel." A timeless armchair that became a true masterpiece of design. Suitable for all environments, from waiting rooms to the living area of private residences, the commercial spaces to the sleeping area. Fabric upholstery cat. C Tonus and Knoll Felt.