YOU MIGHT WANT TO PUT THIS INFO ON YOUR PHONE ... for that day when you need an o-ring!  This showed up on the table of today's MOTO-COFFEE, courtesy of Darrel Stewart, FSSNOC #002.  

These particular o-rings have a story. Anyone care to tell us what that story might be?
​HINT: note the yellow color of one of the o-rings in the photo above...