Here is a picture of Critter Quitters available at the Winter Garden ACE located a 500 S Dillard St. They have a nice video playing that explains how they work. If you live in the area this is where to go to get them
"Dear Sir, very pleased with the order easy install Thank you!"
R EBeverly Hills, FL
"Thank you for your follow-up. I have installed the smaller ones (my first order), but have not installed the larger one yet. While the angle was appropriate for the pitch of my roof, the pieces were too long which required that I cut them down a few inches. This proved a bit awkward with the limited tools I had on hand, but was not a major concern. The larger one is going to have to be cut down as well, but I'm sure I will figure it out as well. I am quite impressed with the product, as it seems to address the exact need (as long as those pesky varmints don't eat it too). Thank you for a well-designed, well-made, reasonably priced solution to such a common problem.
Surprisingly, most people I have spoken to do not know of this problem--or your great solution. I will do what I can to correct that! "