Although there is no standard size for a chest of drawers, the most common size is 38 inches wide. A chest of drawers this size is small enough to fit in most bedrooms, but large enough to have ample storage space. The drawers are also small enough that they won't buckle or sag over time.
A duplex is defined as a house or building with two separate units. An example of a duplex is a house with two living units with a common wall. 1  double; twofold.  designating or of a system of telegraphy in which two messages may be sent simultaneously in opposite directions over a single circuit.
Duplex is a feature available on most of our products. It is recommended that you make duplex the default for your machine and then if you need to print or copy single-sided or simplex you can always change the setting for that one job. Check out the support page for your product to see if duplex is an option on your machine and how to change the default to duplex. Remember you can change the default for both copying and printing. Some machines will even let you receive faxes in a duplex mode.