Product Description This Ricoh GEN3-E3 (MH1603/1803/1903) printhead is suitable for DYSS Apollo UV R220 printers. This is the original Ricoh part. Product Specifications Size: 7.8 x 120 x 35 mm (excluding cables) Head materials: SST, Pd and Epoxy Adhesive Nozzle plate surface: Non-coated SST Number of nozzles: 192 nozzles Nozzle spacing: 0.3387 mm Piezo type: D33 Stacked PZT Temperature control: Integrated Heater and Thermistor Operator temperature range: Up to 80�° C Native drop volume: 30 pl - 45 pl Drop volume range: 12-50 pl Jetting frequency: Up to 30 kHZ Life: 100 billion actuations per nozzle