About: http://webisa.webdatacommons.org/267054638

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	In preferred embodiments, the inner cylinder 82 and outer cylinder 84 are formed from a pliable material such as rubber or plastic such that when the inner cylinder 82 is inserted into outer cylinder 84, they are frictionally coupled.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com