Isosceles Auditorium Chair. Folding arm, made of 15 mm triplex. thick, veneered in unicolor formica 50 x 30, with madecanto edge. with book holder. Back and seat upholstered in cloth or cordovan. 5 cm pink foam. density 26. External shell in polypropylene on the back. 1” 16 gauge oval tube structure, finished with electrostatically applied epoxypolyester baking powder paint.