Our customers needed their disabled child to have easy access to second floor bedrooms. Carrying him up and down the stairs was increasingly difficult and they were concerned about possible injury to themselves. A stair lift was the perfect solution! The Harmar SL600 Straight Stair lift has a built-in retractable seatbelt, and a 19"W x 16"D x 18" H seat. Additionally, it supports up to 350lbs. If a stair lift is needed for a user up to 650 lbs., the Harmar SL600 HD is a great option.