About: http://webisa.webdatacommons.org/118921664

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 19 may be made of any suitable flexible material such as rubber or a thermoplastic material.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com