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.