Cu-OFE (Oxygen Free Electronic Grade) is a high purity, oxygen free, non phosphorus-deoxidized copper.
This pure copper has a guaranteed minimal amount of 99.99% of copper and a minimal electrical conductivity of 101 % IACS (international Annealed Copper Standard)
Automotive Rectifiers Anodes for Vacuum Tubes
High Resistance-Ratio Cryogenic Shunts
Transistor Component Bases