Ideal for general office black-and-white and colour printing and in-house marketing printing. HP 504A Black LaserJet Toner Cartridges with improved HP ColorSphere toner provide fast, professional results. Get reliable, consistent performance from everyday documents to marketing materials, and time-saving supplies management features.Compatible Printers: HP LaserJet Enterprise 500 color M 551 Series, HP LaserJet Enterprise color flow MFP M 575 c, HP LaserJet Enterprise 500 color M 575 c, HP LaserJet Enterprise 500 color M 551 dn, HP LaserJet Enterprise 500 color M 575 dn, HP LaserJet Enterprise 500 color M 551 xh, HP LaserJet Pro 500 color MFP M 570 dn, HP LaserJet Enterprise 500 color M 575 f, HP LaserJet Enterprise 500 color M 551 n, HP LaserJet Pro 500 color MFP M 570 dw, HP LaserJet Enterprise 500 color M 575 Series, HP LaserJet Pro 500 Series, HP Color LaserJet Managed MFP M 575…