This isn't a cartomizer design. It is just a three piece ecig. There is wicking material but It's not a stuffed cart. It employs a polyfill ring with regards to the thickness of a little nylon washer. maybe about 2mm thick. The poly washer rests on a small flange on https://electroniccigarette99764.wonderkingwiki.com/1195490/jak_si_správně_vybrat_elektronickou_cigaretu_fundamentals_explained