Tiny Tuesday

I was looking for something to blip for Tiny Tuesday other than a flower or snow. Hubby had finished connecting the water and the heating pipes in the toilet and I was inspecting looking at the result when I spotted a pile of shiny copper elbows. I was intrigued as each one is stamped with the diameter and other markings just like a hallmark, as shown in the image.
It was a shame to covert the bright coppery colour for the Mono Monthly Challenge so I have made it look a bit grungy instead. 
Thanks to wrperry for hosting this month.
OM50mm, 1/60, f2.8