Ingaphandle yesikhumba. Isiciko seflap ngokuvalwa kwemagnethi. Ibhanti elinokutshintshwa kunye nelisuswayo ngesinyithi. Ukukhetha umtya omde wesikhumba womntu ophethe umzimba. Ingaphakathi eligciniweyo elinamagumbi amabini epokothweni kunye nentsimbi.