The Hi-Boy series whirlpools offer complete coverage all the way to the back hip and shoulder areas for full immersion and full-body treatment * Whitehall also offers an optional Adjustable Suspension Seat or Tank Top Seat so lower extremities such as the lower leg ankle and foot areas can still be treated * This option provides a standard mobile unit * Product Function: * For use on middle back * Product Details - Material: Stainless Steel * Legacy Model: JO-40A * Appropriate for: Athletic Trainer Physical Therapy * Capacity in Liquid Volume: 75 gallons * Body Treatment Location(s): sitting mid back * Internal Length: 42 * Internal Width: 20 * Internal Depth: 28 * Certification(s): MET CE