About: http://webisa.webdatacommons.org/435782791

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 stopper may be integrally formed as part of the plunger rod or be a separate base made of the same material as the plunger rod or another material such as a thermoplastic elastomer, natural rubber, synthetic rubber and the like.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com