Specifications Technology: Advanced MicroPiezo® TFP print head with ink repelling coating technology Type: Drop on demand ink jet printhead Number of channels: 10 Operating frequency: Up to 50 kHz Drop volume: 1.5 - 3.5 picoliters (Multi drop size technology) Nozzle per channel: 360 Total amount of nozzle: 3600 Compatible ink types: Pigment Manufacturer: Epson Printer compatibility: Epson Stylus Pro 7700 / Stylus Pro 9700 / Stylus Pro 7900 / Stylus Pro WT7900 / SC-P7000 / SC-P9000 DP part number : PPHEP16821 This Advanced MicroPiezo TFP printhead is suitable for Epson Stylus Pro 7 and 9 series printers. This is the original Epson part (number F191040 or F191010).