BCH Twin Black Ink Refill Kit - Refill Set for HP 564, 564XL, 920, 920XL Black Ink Cartridges (2 x 30 ml Black) Genuine Premium pigment refill inks in bulk package. BCH inks produce a wider gamut for more vivid color, durable prints resist fading. Match or Exceed OEM specification on color, pH, surface tension and viscosity Ideal for printing shop and small businesses. Package includes: 30 ml bottle x 2 + hand drill tool + color manual