HP 55X (CE255X) Black Toner Cartridge High Yield, 2 Toner Cartridges (CE255XD) for HP LaserJet Enterprise 525 P3015 HP LaserJet Pro M521 HP 55X (CE255XD) toner cartridges work with: HP LaserJet Enterprise 525, P3015. HP LaserJet Pro M521. Save up to 25% with high-yield HP toner. Operating temperature range: 10 to 32.5C HP 55X toner cartridge yield (approx.) per cartridge: 12,500 pages Save moneyget double the print volume at a lower price with 2 Original HP 55X (CE255X) cartridges in one package (CE255XD). See 55A (CE255A) for standard size option of HP 55 black toner. What's in the box: 2 New Original HP 55X (CE255X) toner cartidges in one package (CE255XD) Color: Black