It's not a cartomizer model. It is just a three piece ecig. There's wicking material but It's not necessarily a stuffed cart. It uses a polyfill ring regarding the thickness of a small nylon washer. perhaps about 2mm thick. The poly washer rests on a small flange on the center https://electroniccigarette10864.plpwiki.com/6514378/rumored_buzz_on_jak_si_správně_vybrat_elektronickou_cigaretu