Adjusts from 45″ to 108″. The uprights on this gymnastics equipment hi bar are 2″ square heavy guage chrome plated steel. The upright bar collar features Quick Change Eyebolts and Tightening Knobs. Simply unscrew the knob and pull out the rail / bar with the eyebolts remaining attached to the rail / bar. Insert the other rail / bar with eyebolts attached and tighten with knobs. Collar adjust with adjustable clamping pin. Includes cable load binder to release tension when adjusting bar. Requires 4 floor plates. Minimum floor plate dimensions 13’x 16′.