1.CISS for HP IP4680 2.With auto reset chip and quality very stable 3.MOQ:1set For Canon ip3600, ip4600, mp540, mp620, mp630, mp980, ip3680, ip4680, mp638 printer, etc. Compatible ink cartridge corresponding model: PGI-520BK, CLI-521BK/C/M/Y PGI-220BK, CLI-221BK/C/M/Y BCI-320BK, BCI-321BK/C/M/Y PGI-820BK, CLI-821BK/C/M/Y