"DanG" wrote:

Is there some special reason for aluminum? What is 4 inch
scaffolding?

Most scaffold sets are steel. Look up Perry or Sonny:
http://www.perryscaffolds.com/
http://www.sonnyscaffolds.com/

Ooops sorry typo on my part

I want 4 foot scaffold not 4 inch

And want aluminum so its strong yet light and easy to
carry around by myself