Our first goal is to get you thinking quickly about the "modular" nature of our monitor stands. Once you see where each Part starts and ends, it's easier to see how the various parts can also be used to create the Lamps, Sign Posts, sturdy camera and lighting trees worthy of your money, and much more. 

NOTES about Mounting Plates and Assemblies:

1)  A Mounting Plate Assembly typically consists of a mounting plate, a low profile mounting bolt, a washer or washers, a wing nut and  quantity of 4,  m4x10 screws for connecting your monitor to the mounting plate (unless otherwise noted).  The m4x10  screws are fairly standard for monitors using VESA mounting configurations,  but we admit up front, these may not work for everyone and you may have to buy other screws for your mounting needs.
2) Mounting Plates can be mounted  via top, middle or bottom holes pre drilled for that  OR you can make your own easily with a cordless drill. (This drills out like plastic even though there are thin venears of aluminum on it too). 
3) Mounting Plate material is an "Aluminum Composit Material" (ACM). It's plastic in the middle with thin, prepaintd aluminum veneers   that can be modified far easier than steel  with a drill and tin snips.
4) All mounting plates come with VESA 75x75 mm and 100x100 mm mounting hole patterns as well as three additional mounting holes for connection to our brackets. These VESA patterns are industry standards for small and mid size monitors. 
5)  ACM and other substrates (like plywood, ABS, Aluminum, etc) can be attached to multiple mounting plates or mounting plate brackets to create a multi-point connection to posts for larger loads.  

NOTEs:  

1) 14", 16" and 17.5" telescoping assemblies comfortable telescope from 14" to 20",  16" to 24" , and 17.5" to 26" respectively.  You may want to buy or create a small plastic busing from Pex ( a plumbing supply product)  if you are extending a lot, to keep the upper part looking perfectly inline with the lower.  
2) Two 22" monitors will fit on 16" Telescoping Assembly pipe with 3" to spare.NOTE: you would need a 20" to 24" single pipe to mount two 22" monitors.  
3) You can also buy non-telescoping posts for lower costs or split your telescoping post in two  for two, but you may need an additional fitting or two  to put them both to use.
4) PVC , cpvc, copper , steel and other material can be chosen for posts  if they fit the application. (We may sell some but not all of those solutions standard, but will consider large special orders)
5) At your local hardware store you should be able to buy a 10 FOOT piece of this pipe for $6 to $11 .  A great deal if you need multiple and can cut and deburr it (which we tell you how to do on another page).  You can also buy the fittings, although one needs to be modified if you want the ergonomic screw. 

There are many base assembly options.  This is where we can help you express your own creativty a little more just by selecting from a wider range of options. 

You have the basic vocbulary now and you understand the pieces as used in a Monitor Stand application.  Below we are going to  dive a little deeper now to continue the flow of thought to help you think about more needed to specify your own.