To use with HP laserjet 1010,1012,1015,1018,1020, 1022 series, P1005, P1006, P1505 series, 3050 series, M1005 MFP. HP 12A Ultraprecise Black Laser Cartridge ensure extra sharp, black text, smooth greyscales and half-tones. Helical roller drive eliminates banding for accurate print quality and reliable performance every time you print. it feature precisely matched components to guarantee consistently reliable performance. In-built reliability and rigorous quality testing ensure maximum printer up time with minimum user intervention.This cartridge has a convenient all-in-one cartridge design that allows effortless installation and maintenance. Magnetic seals lock the toner inside the cartridge to prevent leakage.