I just received an order that included a number of the windows for our Piggie cage, and I am so happy! Very easy to install, and cut perfectly to size with holes for cable ties pre drilled. Also lots of cable ties included. I got them as a cat proofing solution, to keep our curious kitty from reaching into the cage, and they work a treat! I have put them on the sides of the cage in places where she was repeatedly reaching in, and also a couple on the roof (the cage lid) over where the ramp is, and the food bowls, as this was another spot where she liked to go & fishing for piggies. Now she has to be satisfied with just peering through the windows :) I was going to attach mesh over the cage, but these are so much more attractive, and it means we can still easily see our little pigs in their cage. Yay!