About: http://webisa.webdatacommons.org/134650411

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	??? 10 gauge tubing ??? Heavy 1.9 - 9 gauge top rail ??? Variety of lengths & sizes ??? Various types of mounting system
http://www.w3.org/ns/prov#wasQuotedFrom	issuu.com