Take note: If you enter key phrase "6303RMX" into eBay or Amazon, you will notice the availability of OEM dimension bearings - 10X42X13. "6303RMX" is stamped about the OEM idler #2 bearings. I have solid uncertainties about these remaining quality bearings, including the Koyo bearings labeled as being designed in https://ourbigdirectory.com/listings13187122/examine-this-report-on-ca