About: http://webisa.webdatacommons.org/215859540

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 shaft of the tube is made of a soft material, such as silicone, and is reinforced along the fenestrated region by a frame of a stiffer material.
http://www.w3.org/ns/prov#wasQuotedFrom	faqs.org