The Back Pads are available in two different heights. They are used to reduce the seat depth of the chair. The pad is removable from the mounting support so that the length of the mounting bolts can be changed to any length required. It is recommended to use the smaller height pad at the sacrum for specific pelvic control, and the larger height pad up higher to create a new “back” to the chair. The Back Pads can also be used to “fill in” the space under Inserts as they are raised to accommodate for growth.