About: http://webisa.webdatacommons.org/322765706

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 spacers 30 have preferably flat edges and are made of plastic, such as nylon or TEFLON (manufacture by DuPont, USA), although they may be made of other materials such as rubber.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com