PROTOP WAY INTERNATIONAL CO LTD

We also sell copper with 99% purity, our specification is as follow
Copper (cu) 99. 99% .
Other materials may be present which are described below:
Oxygen o2 --
Sulfur s 4 ppm
Iron fe 2 ppm
Silver ag 10 ppm
Lead pb 0. 2 ppm
Nickel ni 0. 2 ppm
Selenium se 0. 3 ppm
Antimony sb 0. 1 ppm
Silica si 0. 3 ppm
Cobalt co 0. 2 ppm
Arsenic as 0. 1 ppm
Bismuth bi 0. 1 ppm
Manganese mn 0. 1 ppm
Tellurium te 0. 05 ppm
Aluminum al 0. ...