Izindonga zamakhethini ziwudonga oluncane noluhlaka lwe-aluminium, olunezinto zokugcwaliswa ngaphakathi kwengilazi, amaphaneli e-aluminium, noma itshe elincanyana.
Ngokungafani nezinye izinto zokwakha, uhlelo lodonga lwamakhethini luncane futhi lulula, ngokuvamile i-aluminium nengilazi.Lezi zindonga azizona izakhiwo, futhi ngokuklama, zikwazi ukuthwala isisindo sazo kuphela, ngenkathi zidlulisela umthwalo womoya namandla adonsela phansi esakhiweni sesakhiwo.Idizayini yenza kube nomoya namanzi ukumelana, ukuze kuqinisekiswe ukuthi ingaphakathi lesakhiwo lihlala lingenawo umoya.