The uneven parallel bars or asymmetric bars is an artistic gymnastics apparatus.It is made of a metal or steel frame. The bars are made of wood, plastic, or composite materials.Height including about 30cm for landing mats: upper bar: 245 cm (approx 8 feet) lower bar: 165 cm (approx 5 feet, 5 inches) Width of bar: approx 1.5 inches Length of the bars: 240 cm Diagonal distance between the two bars: 130–180 cm (adjustable)(source wikipedia)polygonalpolygons 20497Vertices 21190