Isakhiwo sinosayizi abahlukahlukene, futhi ezijwayelekile yilezi: 21*41/41*41, 41*62, 41*82, njll. Umshini ofanayo ungakha osayizi abahlukene, ungathatha umklamo oguquguqukayo ozenzakalelayo ngokugcwele noma umklamo wekhasethi noma ulungise ama-roller. nge shim.
Amaphrofayili esakhiwo asetshenziswa kabanzi, hhayi nje kuphela asetshenziswa kabanzi ekusekelweni kwelanga, kodwa futhi nasekusekeleni okulwa nokuzamazama komhlaba, ngamandla ayo aphezulu kanye nokufakwa okulula, kuye kwatuswa kabanzi futhi kusetshenziswe imboni yezokwakha.