This page covers the IKO LRT320360118, an Inner Ring from the IKO Inner Rings product series. Its category path is Brand > IKO > Inner Rings, and it is identified as an inner ring designed for metric shaft use.
The supplied data lists the following specifications:
The bearing material is listed as high carbon chrome steel, also described in the product title as high carbon steel. The product data indicates that the LRT320360118 is to assemble with RNA4964, with assembled bearings listed as RNA 4964.