Phos-Copper welding rod , phosphorus from 6.5% to 8.5% , widely used in refrigeration, freezer, a/ c , home appliance , motors... Phos-Copper welding rod , phosphorus from 6.5% to 8.5% , copper from 91.5% to 93.5% , harris type , widely used as weldding material in all kinds of copper and copper alloy welding for refrigeration, freezer, air conditioner , home appliance , motors... etc