... available 4 poles 60A porcelain knife switch1) 4 poles knife switch series:4P60AD,4P100AD.2) doube throw/change over or single ... alloy,brass for your choice4) our main market for knife switch include egypt,nigeria,india,pakistan,etc.5) our factory locates ... ) easily use,economic choiceif you have interests for our knife switch,please feel free to ask me for more details.Your ...