Isiseko sesilivere iflefasi sisiseko seflegi esiqhelekileyo, esisetyenziselwa ukulungisa iflegi kwaye sigcine uzinzo saso. Umzimba wayo ophambili uhlala kwisilivere, kubume be-disc, kwaye bunokubekwa kuwo nawuphi na umphezulu. Inxalenye yeziko lesiseko inomngxunya wokufaka iflegi. Ubunzima kunye nobungakanani besiseko buya kukhethwa ngokwenqanaba nobunzima beflegi yokuqinisekisa uzinzo lweflegi. Isiseko seflegi sihlala senziwa ngentsimbi, enje ngentsimbi, i-aluminium okanye intsimbi engenasimo, ukuqinisekisa ukuqina kunye nokuzinza kwawo. Zihlala zipeyintwe ngepeyinti yesilivere ukuthintela ukrokrela kwaye yongeza i-aesthetics yabo. Ukongeza, ezinye iziseko zeflegi eziphezulu zinokwenziwa ngesilivere okanye ezinye izinyithi ezixabisekileyo zokongeza kwimvakalelo yazo efanelekileyo. Ukongeza, ezinye iziseko zeflegi yesilivere inokuba nezinye izinto, ezinje ngoyilo olunamavili ukulungiselela ukuhamba, okanye uyilo lwezixhobo zokutshintshwa ukuthintela iflegi ukuba ibiwe okanye icinywe ngumoya.