<https://www.electrixinternational.com/us/stainless-steel-conduit-systems/>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://www.electrixinternational.com/us/stainless-steel-conduit-systems/stainless-steel-metric-conduit-system/stainless-steel-metric-conduit-accessories/uk-mun-base-metric-conduit-munson-ring-base-stainless-steel/>