Weldcraft Tungsten Electrodes Package of 10 Tungsten Electrodes MFG # WP018X7 Type: Pure Tungsten (EWP) Forms a clean, balled end when heated and provides good arc stability for AC welding with a balanced or unbalanced squarewave or sine wave. Size: 1/8" X 7" (3.2 mm X 175 mm) Applications: AC Alloying Element: None Composition: 99.5% tungsten 0.5% Other Materials welded: Aluminum, Magnesium