Photo Challenge #4 Circles

This week's photo challenge is circles--I immediately thought of these pictures I had taken earlier this year at my husbands business.  He & his cousin made the tough decision in June to close their family business, Torrington Casting after 91 years ( they are the 3rd generation to run it).  It was a brass foundry specializing in plumbing fixtures. 

A few more photos that fit into the category.  So many circles in the shop!

Camera--Canon EOS Rebel XSi
ISO 400
Focal length 71.5mm
Aperture 4.63
Exposure .0167s
F- f/5