Mike, here is a link to the Grainger site showing the information that you asked me for. The nominal specs are 3/32″ x 7/32″ x 13/32″, indicating cross section, ID, and OD. The actual sizes are slightly different, see the specs. The composition is buna-n rubber with the durometer (hardness) of 70.
https://www.grainger.com/product/FABORY-O-Ring-41UK05
Improvise-Adapt-Overcome
