We are so confident that you will love your new Circle D converter, that we are willing to guarantee it. If you allow us to spec out a custom converter built for your application and you are not totally satisfied we will do what ever it takes to make you happy. If for some reason you are not satisfied we will refund 100% of your money back. We also offer our industry leading 2 year warranty that includes a freshen/cleaning or a stall change. So, how can we move you?