Specifications:
The backrest structure of the Harmony U 178 Ben Wu chair is made of iron and cold moulded polyurethane foam. The seat base is constructed from wood with elastic bands, covered in multi-thickness polyurethane foam. The upholstery is glued to the frame, making it non-removable. Four toe caps in bronze-coloured PLA can be inserted to protect the leather covering the bottom of the leg. These caps are easy to insert and remove, providing a perfect base for the chair leg shape.

Technical Drawings:
The document includes technical drawings that detail the construction and design of the chair, emphasizing the materials and assembly of the backrest and seat base.