1.continual ink supply system 2.One time used cartridge . 3.100% quality guaranteed. 4.customized package are available ... supply system 1).Suit for hp,canon,brother,epson,samsung,dell,lexmark,etc2) 500/900 Pages yield 3) 1.53 black ... supply system (CISS),suit for hp,canon,samsung,brother,epson,dell,lexmark,ciss system