About: http://webisa.webdatacommons.org/50152845

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	steel, PTFE, or PEEK. A composite such as PTFE or PEEK is preferred since
http://www.w3.org/ns/prov#wasQuotedFrom	patents.com