Bought to replace the one I had on an original 30 year old Kirby for 30 years and it works just as well today as it did the first day I bought it. How do you prove that the product is of the highest quality? Do your research guys before you buy. My research has grown upright with Kirby in a 4 story building. It was in my mother's closet when she died. Now I can pass this on to my kids, when I'm under 30 they can keep their paws off until I'm gone. :o) I can't beat Kirby!