PREMIUM QULAITY OF HP GENUINE WASTE TONER UNIT TONER CARTRIDGES YIELDING APPROX 36,000 PAGES. COMPATIBLE PRINTERS (IF ANY): HP COLOR LASERJET CM3530,HP COLOR LASERJET CP3525,HP LASERJET ENTERPRISE 500 COLOR M551,HP LASERJET PRO 500 COLOR M570,HP LASERJET ENTERPRISE 500 COLOR MFP M575