Tub Sleeper Cat Window Perch The Tub Sleeper Cat Window Perch is purr-fect for those lazy sunny days. Mounts in seconds on most any opening windows (with or without a sill) and since it is not screwed into your window can be moved easily to any window in your home. Our mounting system makes it safe and secure. Your pets will enjoy hours bird watching, people watching or just napping in their favorite sunny spot!! If you have a soild pane window we can modify it to work there as well. Please contact us for more details before ordering. 17" inside diameter 3 1/2" sides Plush carpeting in your choice of 4 different colors