Specification: Color: Black / Yellow, Magenta / Cyan, CMYK (Optional) Applicable models: for HP Z2100 / T1200 / T1300 / T610 / T620 / T1100 / T770 / T790 / K8600 / 8500 / K550 / K5400 / K5300 / L7580 Size: 90 * 60 * 20 mm / 3.5 * 2.4 * 0.8in Weight: approx. 80-160g Package List: 1 or 2 * Print Head Note: Please remove the polishing cardboard nozzle and remove the orange rubber plug before installation.