Detailed introduction to Seiko SPT510 35pl printhead Seiko print head: Features: SII Printek Inc. The SII Printek SPT series is designed for integration into a variety of printing applications. It features a fast firing frequency and high precision combined with a long useable life. Specification : Model : SPT 510 35pl Active nozzles: 510 Print swathe width: 71.8mm Native resolution: 180dpi Max. Resolution: 720dpi Firing frequency: 6.46 or 8.29khz Type of ink: solvent Nozzle density: 185npi Drop SIze: 34pl Place of origin: Japan