"Wide Application Cat perch bed is design for using on window sills. Cats can enjoy sunbathing and watching outside on it. It can also be placed on the bedsides, allowing you and your cat to accompany each other and keeping cat hair from getting all over the bed. Drawers, cabinets would also be the applicable places. How to Install? 1. Hang the cat perch on the window sill by the metal hook. 2. Move the 2 support rails to fit the thickness of the carrier. 3. Screw tight the thumb screws. Specifications: Material: Metal, Wood Dimension: 21.7 x 15 x 6.9 inch Solid wood, durable,sturdy and smooth to the touch. The high pile mat is so soft and easy clean. The cat perch can satisfied with your cat's curiosity about the world outside. Our window will need to have a railing so the it can be mounted and adjusted to fit. The cat window perch works on mechanical tension and small hooks. Cat hanging bed has a multi-layer wooden plywood frame, high quality hardware, and can hold up to 40 pounds. The cat window perch can be attached with its hang clip in gaps such as window sills, bed,drawers, chair backs and bedsides."