The high back with deep button tufted design 3N! The whole process is entirely handmade of pure, No splicing, No pinholes,Non-machining section. Wider and deeper seats with Sponge and Spring 2S! High density Sponge and Spring cushion for long-lasting softness and resilience. Strong and Durable metal base 3C! The Metal base is Chromed,Corrosion-resistant, Clean easy.