Ferroxcube RM Cores: 295 part numbers in 11 materials (3C90, 3C91, 3C94, 3C95, 3C96...).

TDK RM-type ferrite cores: 193 part numbers in production, materials K1, M33, N30, N41, N45, N48, N49, N87, N92, N95, N97, PC200, PC47, T35, T38.