About: http://webisa.webdatacommons.org/91487736

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	If air or gas filled, the insert should be made of a low permeability material and that material should be viscoelastic such as rubber compounds used for tire inner liners.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com