Suitable for rebuilt cartridge 17A, 18A, 30A, 33A etc, very good printing performance: 1, High density, Average ID was measured with 1.45.2, Completely compatible with OEM toner, no background when mixed with the OEM toner.3, More page yield, >25p/g (5% coverage test).4, The density does not drop during the printing. No background/ no ghosting when print to the later stage of printing.5, non-stick on the blades.