HP 90X (CE390X) BlackToner Cartridge High Yield, 2 Toner Cartridges (CE390XD) for HP LaserJet Enterprise 600 M4555 Print technology: Laser; Cartridge yield (approx) per cartridge: 24,000 pages Approximate average page yield based on ISO/IEC 19752 HP Printer compatibility: HP LaserJet Enterprise 600, M4555 Box includes: HP 90X (CE390XD) 2 toner cartridges & Recycling guide Dimensions (W x D x H): 400 x 390 x 332 mm; Weight: 5 kg; Color: Black This HP product is warranted to be free from defects in materials and workmanship