About: http://webisa.webdatacommons.org/300341235

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	In the preferred form, the components are constructed of steel except for the cartridges, and the finger pad 40 which are constructed of a suitable plastic material such as nylon or polycarbonate.
http://www.w3.org/ns/prov#wasQuotedFrom	patents.com