About: http://webisa.webdatacommons.org/113649994

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 valves are reed types and the rings are a slippery synthetic material.. the upper ring being a wide band rabbet-notched at the gap and the lower being a width more comparable to a cast iron ring.
http://www.w3.org/ns/prov#wasQuotedFrom	diybanter.com