About: http://webisa.webdatacommons.org/276633809

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	Those which do not contain silica or other filler typically exhibit densities of from 0.20 to about 0.55 g/cm3.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com