The Adjustable Bar is created from heavy gauge steel and is made to last through all the pull overs and swinging your shining star can do! The 1-1/2″ steel uprights will adjust between 3ft – 5ft (36, 42, 48, 54, 62″ high). The base is 4″ feet wide and will fit a normal 4′ x 8′ Panel or Landing mat. The wood bar is 1-1/2 inches round with 100lb weight limit and is intended for beginner to intermediate gymnasts. If your gymnast is 70lbs+ and/or level 3, we recommend adding the base extensions more greater stability.