Filament Bushing

For my 3d Printer table I used something called Creform, commonly used for tables and shelves in manufacturing environments. Creform is a very useful tool, its basically like an adult erector set. I have a bunch of this stuff and use it for everything. If you want to get some of see how it works check out their website. http://www.creform.com/ If you want to buy their stuff you need to sign up for an account on http://diy.creform.com/Default.aspx.

The standard diameter of the tubing is 28mm,