Adjustable Back features:

• Those with fixed postural deformities
• Relieve pressure caused by boney prominences
• Accommodates clients with different heights and sizes
• Reduce the amount of Shearing
• Provide privacy between the back and seat
• Relieve discomfort from sitting for long periods of time
• Adjustable support for different areas as fatigue sets in throughout the day
• Pincore Foam Pad 
• Up to 20" x 20"

There is no need to remove back canes in order to attach this back, simply velcro on to back canes and use top grommet hole to attach upholstery with screws.