Now you can rise from any chair, safely and easily with these Uplift seat assists. The Premium Seat Assist Plus has a hydro-pneumatic gas spring, which activates automatically as you stand, supporting up to 70% of your weight. Supports up to 350 lbs. and measures 17 1/5" x 4 1/8" x 18 7/8". If you need more assistance, the Power Seat has an electric motor to help you to a standing position with the push of a button. Easy to use hand control. Supports up to 300 lbs. and measures 19 ¾" x 4 1/3" x 19 3/5". Both models feature patented Levelift™ technology that gently lifts you without pushing you forward. Memory foam cushion for comfort. Waterproof cover for easy upkeep.