About: http://webisa.webdatacommons.org/90314987

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	I would imagine as your part was a moulding the designer would spec a min and max Ra either for aesthetic purposes or to reduce manufacturing costs.
http://www.w3.org/ns/prov#wasQuotedFrom	finishing.com