Choose from a 10 pack of Sky Blue or Grey Tungsten Welding Electrodes... Clarke WL20 Sky Blue Tungsten Welding Electrodes (10 Pack) High quality WL20 2% lanthanated tungsten sky blue welding electrodes. For welding stainless steel, carbon steel, nickel alloy & titanium alloy, non-ferrous metals Suitable for DC/AC long run welding Clarke WC20 Grey Tungsten Welding Electrodes (10 Pack) High quality WC20 2% ceriated tungsten grey welding electrodes For welding stainless steel Suitable for DC stable arc, low current welding