About: http://webisa.webdatacommons.org/199958606

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	Both ball 18 and tube 16 are preferably made of an electrically conductive metal such as stainless steel.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com.au