About: http://webisa.webdatacommons.org/316587555

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	It is preferably made of a hard plastic such as polyamide or DELRIN, coated with a non-stick coating for example of PTFE, but may just as easily be fitted with rollers.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com