The R-Series Printer uses 8 heads.
G0Z22A  Optimizer  Qty 2
G0Z21A  White Qty 2
G0Z24AÂ Â Latex Printhead, used for all colors and Overcoat. Qty 4
(1 K/C, 1 LM/LC, 1 M/Y, 1 Overcoat)
Grow further—achieve high image quality and consistency on a wide substrate range and expand your outdoor and indoor application offering. Maintain efficient operation with easy, productive printing. Recycle HP 831 Latex Printheads.[2]