Fair-Rite FT240-52 Toroid (5952003801)
Toroidal cores are used in a wide variety of applications such as power input filters, ground- fault interrupters, common- mode filters and in pulse and broadband transformers.
You can use these cores for a range of Balun and Broadband transformer project.
The type 52 ferrite is specifically useful as a common mode at the higher end of the HF bands. Please see for more details.