I replaced them on 5200 lb right axles. Yes, I hear people talking about "Made in China" products. However, the need for their annual replacement does not justify the high cost of domestically made parts. Of course, parts such as real bearings or raceways where they are not interchangeable can be considered for domestic products. They tick all the boxes, are the perfect size and last perfectly. I'll be replacing them again next year when I repackage the bearings, so I'll be buying them again.