Pet Shelf Fits Over Windowsill to give your cat an outdoor and indoor view. It’s a great outlook post for people-watching, plus a “purr”-fect perch for daily catnaps! A thermal interior layer reflects pet’s body heat to make those naps extra-cozy. Padded ledge attaches firmly to sill without screws, and can be easily moved for cats who like a change of view. Comes with 2 metal brackets that slide between window and sill, plus 2 rubber-tipped supports. Washable cover. 24" L x 12" D.