Summary "Is there a quicker way to create 6 concentric thin features with .018 spacing between.
Thank you all for your quick response and valuable suggestion.
It turns out to be pretty simple.
As Doug suggest, I just need to use the Pattern feature, selecting the Radius dimension and use .018 as increment dimension and voila`. The pattern did cross my mind; however, I didn't actually try it therefore I didn't know that I can select the radius as an increment dimension.