Cov cwj mem cov lus qhia ntawm whiteboard markers nthuav tawm ntau tus qauv tsim, nrog rau cov uas muaj xws li conical, mos txwv-puab, thiab fiber ntau. Cov cwj mem conical ua rau kev sau ntawv zoo thiab tsim nyog rau kev sau ntawv loj dua; cov mos txwv-zoo li tus cwj mem taub yog zoo dua rau delineating kab thiab cov ntsiab lus; fiber-zoo li tus cwj mem taub tuaj yeem muab kev sau ntawv thiab kos duab zoo dua.
