1. Large Space Cat Window PerchThe size of this cat windowsill perch is large enough for large cat. The main frame of this cat bed is made of thickened wood and hard metal. It is of great that it can holds up to 40lbs firmly on the window. 2. Simple Assembly & Adjustment: The assembly of this cat window hammock is easy that only a few steps are taken to set it up. After the assembly is complete, you just need to screw the thumb screws to adjust the distance between hooks and supports to fit the thickness of your window sill. Avoid the hassle of twisting the screws with a wrench for each time. 3. No Drilling & Suction Cups Needed for Installation: This cat bed is fixed on the carrier by two metal hook and supported by two wooden supports, without the need to damage the wall and the worry of the suction cups falling off. The metal hooks are widened. The surface with the windowsill is larger that protects your window from being damaged by the concentrated force. 4. Furry Fabric Cover: It is soft and skin-friendly without chemical smell. Let your cats feel warmer and more comfortable while lying in this resting seat. The plush cover can be easily removed for wash with velcro design.