Leli yibhokisi lempushana elinezingqimba ezimbili elinephepha lepulasitiki eliphezulu. Ishidi eliphezulu lingaphrintwa ngamaphethini noma izimpawu zokuthengisa, okuzokwenza ibhokisi lonke libukeke lithuthuke kakhulu. Leli bhokisi lempushana libuye libe nemodeli emfushane, okuyibhokisi elingenapuleti eliphezulu, kodwa ezinye izilinganiso zangaphakathi ziyefana. Njengesampula, sifake i-electrop yonke ingxenye yebhokisi. Njengomkhiqizo amakhasimende adinga ukuwu-oda, singahlinzeka ngobuchwepheshe obuhlukahlukene bokwelashwa komkhiqizo ongaphezulu, njengokufafaza upende we-gradient/rabha/upende we-matte, ukuhlangabezana nezidingo ezahlukene zamakhasimende.