The LRT283217 is an IKO metric inner ring in the Inner Rings product series. The supplied data identifies it for assembly with RNA 49/28 bearings and describes it as a general-usage inner ring made from high carbon steel; the list data specifies high carbon chrome steel.
The product is categorized under Brand > IKO > Inner Rings. Its order number is LRT283217, and the supplied data lists the assembled bearing as RNA 49/28. Use these stated identifiers and dimensions when confirming compatibility with the referenced assembly.