Take note: When you enter keyword "6303RMX" into eBay or Amazon, you will see the availability of aftermarket size bearings - 10X42X13. "6303RMX" is stamped about the OEM idler #two bearings. I've sturdy uncertainties about these getting quality bearings, such as the Koyo bearings labeled as getting built in Japan https://directoryprice.com/listings730849/about-debt-collection-service-in-anaheim