About: http://webisa.webdatacommons.org/22722598

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	They are made from plastic, vinyl, or certain metals such as steel or aluminum.
http://www.w3.org/ns/prov#wasQuotedFrom	wisegeek.net