Nice Product as an add on item for your Flowtron bug sapper. The best part of the design is that the outer curl has a closing clasp. So, once you snap your Flowtron Sapper into it the clasp holds it in place and the wind or a frisky animal (such as your neighborhood raccoon) won't dislodge the product. Why is that good? Well because the Flowtron's cage unit has a tendency to crack when it falls six to eight feet to the ground. We found that our squirrels and a raccoon must have thought it was a feeder and they have tried jumping up on it and the clasp keeps it from crashing down.