1This is a professional print head that is compatible with a wide range of models 2This print head is smooth and stable, and the color is natural. It is a worthy print replacement that you deserve 3High quality ink with high degree of reduction and sufficient ink to save your cost 4The nozzle is polished, no paper jam, and the printing process is smooth 5All use Bayer raw materials from Germany, the quality is guaranteed Features: 1. This is a professional print head that is compatible with a wide range of models. 2. This print head is smooth and stable, and the color is natural. It is a worthy print replacement that you deserve. 3. High quality ink with high degree of reduction and sufficient ink to save your cost. 4. The nozzle is polished, no paper jam, and the printing process is smooth. 5. All use Bayer raw materials from Germany, the quality is guaranteed. Specification: Color: C4820a Black, C4822a Magenta, C4823a Yellow, C4821a Cyan, CMYK (Optional) Applicable models: for HP1000 / HP1050 / HP1055 Printer Size: 70 * 58 * 18 mm / 2.8 * 2.3 * 0.7in Weight: approx. 51-202g Package List: 1 or 4 * Print Head Note: Please remove the polishing cardboard nozzle and remove the orange rubber plug before installation.