It's not a cartomizer design. It is just a three piece ecig. You can find wicking materials but It isn't a stuffed cart. It takes advantage of a polyfill ring regarding the thickness of a small nylon washer. perhaps about 2mm thick. The poly washer rests on a small flange https://electroniccigarette65320.pennywiki.com/4412944/detailed_notes_on_electronic_cigarette