There are Switch Copper Contacts offered by us that are made for being used in the various applications. In general they are effective on contacts which are not required to switch frequently at moderately high currents. Copper contacts have the advantage that their relatively modest price permits them to be larger, so that higher contact forces can be used and larger wear can be tolerated. Copper contacts can also become dirty with black scuff marks if the contacts have something inserted and removed on a regular basis. The Switch Copper Contacts are very efficient made for easy installation.