1. No Suction Cups or Drilling Needed Ensure your window has a SLOT at least 0.5 inches deep for the perch to hook onto (hook thickness: 0.04 inch). The bracket is widely adjustable to fit various setups, with a maximum window sill depth of 9 inches. 2. Unobstructed View Large Space Cat Lounge Holds up to 40 lbs. With bed size: 24.8'' x 15.4'', Our Comfy cat perch for window sill a generous lounge area for your cats to stretch, play, and enjoy the view. The perch can be moved from window to window by simply lifting it up. 3. Supportive and Secure Design Featured soft bolsters on three sides, the plush bed provides gentle support to your cat's joints and muscles, providing a secure and enclosed sleeping space to curl up and nap in the utmost comfort. 4. Sturdy Build Material Our cat window perch is crafted from premium hardwood and machine washable fabric. Rest assured that your cat can ly perch by the window without any wobbling or tilting.