Customize your existing rack with the SC-HRE Height Adjustable Rack Extension Pack. The SC-HRE allows you to convert your fixed height rack to a height adjustable rack, it has a notched numbering system for easy height identification. 18” total length with 3” of cross bar mounting clamp space. Add 14” of vertical adjustability to your set up. Use to help build custom height adjustable keyboard stands, DJ stands, percussion stands, drum set racks, and more. RMAA tube joint end clamp fits over a 1- 1 ⁄ 2 ” diameter bar.