The IRT3525 is an IKO Inner Ring designed for shell-type assembly use. The supplied data identifies it as a metric inner ring made from high carbon chrome steel, with the product title also referring to high carbon steel.
The IRT3525 has a shaft diameter and inside diameter of 35 mm, an outer diameter of 40 mm, and a width of 25.5 mm.
The supplied product data lists the TA 4025Z under assembled bearings for TA_Z and TAM types, and YT 4025 under assembled bearings for YT and YTL types. The listed TLA_Z and TLAM field contains no specified assembled bearing.