It took me a while to get them on just right. My dog was helping me by trying to pull them off while I was putting them on. If they are not tight they can easily pop off which tells me I didn’t put it in tight enough. It does great keeping the rats out.

I ordered 4 of these as we have the 80 lb feed silo and we have it positioned in the corner of our run. While the design of the silo mostly keeps water out of the open ports, we did get a little rain in a couple of the open ports after a particularly windy storm so we ordered the covers as extra protection for the ones facing the outside of our run. The covers are snug and fit PERFECTLY, they aren't loose in any way but are easy to install and remove, as necessary.

The Coopworx feeder is a great size and holds enough food to last a 3-4 days with my 14 hens. The hens don't have any problem getting to the food. My only issue is food waste, if the feeder ports were angled down they might not be able to pull
out a lot of food at once. Besides this it's a great product

These port covers are so much better than the ones that come with the feeder. The original ones were too easy to get off by a crafty critter. These fit so much tighter and no critter will be able to get them off. At times they are a bit snug but that's a good thing. We learned you have to squeeze them in the middle to pull them off.

It is very good! The covers are great!