Meet the Kitty Kubby: a catio for your kitties that gives them a 360-degree view of your outside. It can be installed in 1 minute in double hung or single hung windows from 24 to 36-inches. It is tested to hold over 45lb of weight.
The Kitty Kubby measures 16″ H x16″ W x18″ L. It has an acrylic and UV resistant plastic construction. You can find out more about it here.