About: http://webisa.webdatacommons.org/209201682

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 walls of the float may be formed of a metal such as stainless steel or fiber glass and the float is advantageously filled with a light weight filler such as polyurethane foam 35.
http://www.w3.org/ns/prov#wasQuotedFrom	freepatentsonline.com