About: http://webisa.webdatacommons.org/118778682

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	The sheaths comprise a tubular, polymeric material and are either coated or are formed of a low friction material, such as polytetrafluoroethylene (PTFE), known commercially as Teflon???.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com