Cartridge makes replacement simple. Staples easily fasten documents. Staple Cartridge Type: Standard; Quantity Per Box/Pack/Carton: Three Cartridges Per Pack; 5,000 Staples Per Cartridge; 15,000 Staples Per Pack; For Use With: Workcentre PRO245, 255, 165, 175, 55, 35, 265, 275, 232, 238 Workcentre M45, M35, M55, M165, M175, 265, 275, 245, 255, 232, 238 Copycentre 265, 275, 232, 238, C55, C35, C45, C165, C175, 245, 255.