The industry’s only 600 lb. capacity stairlift, the Pinnacle SL600HD combines comfort, mobility and convenience. Featuring a high-backed, contoured extra-wide seat, the SL600HD delivers a comfortable ride, while sturdy armrests and a reinforced footrest add stability for safer transfers. The HD is the mobility solution that provides unmatched peace of mind, with industry-leading battery operation during a power outage and no track lubrication required.