It's not a cartomizer model. It's a 3 piece ecig. There exists wicking material but It's not a stuffed cart. It employs a polyfill ring with regard to the thickness of a little nylon washer. maybe about 2mm thick. The poly washer rests on a small flange on the center https://laneuchms.signalwiki.com/1201996/elektronické_cigarety_pro_zacatecniky_an_overview