This isn't a cartomizer design. It is just a three piece ecig. You can find wicking material but It's not a stuffed cart. It works by using a polyfill ring about the thickness of a small nylon washer. perhaps about 2mm thick. The poly washer rests on a little flange https://elektronick-cigarety-pro64319.wikiinside.com/1479659/the_electronic_cigarette_diaries