Magnet-ka ferrite ee la isku duray, magnets-ka ferrite ee isku xidhan, waa magnets-ka ferrite ee joogtada ah ee ay soo saartay habka duritaanka. Budada ferrite ee joogtada ah oo lagu daray xabagta xabagta (PA6, PA12, ama PPS), oo ay ku xigto duritaanka caaryada, magnets-ka dhammaatay waxay leeyihiin qaabab adag iyo saxnaanta cabbir sare.