Polaroid Professional H-934XLK-SPRO Inkjet Cartridge Replacement for HP C2P23A/934 XL, Black Ink Premium ink Cartridge that Meets or Exceeds OEM quality, page Yield, and reliability; Black Made in the USA 1-year warranty, 100% performance guarantee (the use of this Polaroid Professional Print cartridges does not void your printer's warranty) Compatible hardware: HP Office jet Pro 6230 e-All-In-One/ Office jet Pro 6830 e-All-In-One Page Yield: 1,000