MODUS chair by Osvaldo Borsani for Tecno/Italy, 1980s More pieces available The seat shells are made of ABS plastic a material that is known for its strength, beautiful in shiny blue Marked with manufacturer stamp Black coated tubular steel construction underneath Normal signs of age and wear Very comfortable and practical, can be stacked and joined together. Can also be used as waiting room chairs This piece has an attribution mark, I am sure that it is completely authentic and take full responsibility for any authenticity issues arising from misattribution