The OEM R73-0052 / F2G69A Automatic Duplexer is a genuine HP product designed specifically for the HP LaserJet M604, M605, and M606 printers. This automatic duplexer allows for efficient printing by automatically flipping pages to print on both sides, reducing printing time and paper usage. With dimensions of 2 inches in height, 3.50 inches in length, and 12.80 inches in width, this duplexer is compatible with the specified HP LaserJet models and series, offering a reliable printing solution for businesses and individuals alike.