Step Assist are bathtub access stairs designed for use by individuals with lower extremity disabilities or arthritis. These steps have a modular design that allows stacking a second step for an additional rise while a third unit provides a stair-step effect. The step has an extra-large platform with a textured finish top for added slip-resistance. Rubberized feet help prevent the unit from slipping. DIMENSIONS(WxLxH): 19.75 x 16 x 4 inches. One step adds 4 inches; a second one stacked adds an additional 2 inches. CAPACITY: 418 pounds. WEIGHT: 3 pounds. COLOR: White with blue top. GUARANTEE: 90-day satisfaction guarantee.