K&H Pet Products EZ Mount Window Bed Kitty Sill (27" x 11" x 6") - Mounts to Virtually Any Glass Window or Door Cat hammock bed mounts to any window Industrial-strength EZ Mount suction cups hold up to 60 lbs. Installs in seconds to glass windows or doors. Open top for easy access. Makes a perfect spot for your cat to bird watch Includes Amazin' Kitty Pad: acts like an insulator to absorb and hold your cat's body heat. One-year limited warranty