The sturdiest, most attractive, easy to assemble cat sill. It snaps together and is adjustable to any window sill using the provided velcro fasteners and will support over 40 lbs. A 14in x 24in oval layer of super soft orthopedic foam is covered with washable faux lambskin to provide year round comfort. Screws are provided for more permanent attachment. Limited one-year warranty from manufacturer.