The LRT303516 is an IKO inner ring within the Inner Rings product series. It is listed under the category path Brand > IKO > Inner Rings and is described as a metric inner ring for general usage.
The supplied product data identifies the following measurements for the LRT303516:
The product data lists the bearing material as high carbon chrome steel; the title introduction also refers to high carbon steel. The supplied assembly references are TAF354520, NAX3530, and RNAF 354716. The reported mass is 31.5 g.