Dexter axles are marked with serial numbers. Once you have the serial number, call Dexter's service department with that serial number and they will email you a build sheet for your axles. Any trailer axle parts dealer can take the Dexter part numbers for bearings and seals cross over to standard bearing/seal part numbers.
https://www.dexteraxle.com/Contact/FAQ/Axles
Hope this helps,
Bill
https://www.dexteraxle.com/Contact/FAQ/Axles
Hope this helps,
Bill