I'm glad you're interested in our pulley cover. You have a valid point in which we would like to hear others chime in on as well. From our end, I can tell you that we've been selling them for nearly a year and a half and have not had any claims of damage. It's hard to say for sure what conditions they are being used in but I can assure you that no-one has come to us claiming belt/pulley damage due to our pulley cover.
As you may know...All of our products are on Black Friday sale for a few more hours. If you want to get a really sweet deal on it, you might want to order it today but please make sure you're comfortable doing so first.
Let us know if we can answer any further questions.
5-0dro
www.5-0dro.com