Exceptionally high impact resistance, heat resistance and thermal conductivity. Higher heat resistance than lava nozzles. Most popular nozzle type in TIG welding. Resist splatter build-up. Recommended for most welding operations except for use in confined areas. Alumina nozzles are made from high strength alumina. Have very good electrical insulating properties.SEPTLS10013N08. TLS10013N08. Anchor brand Anchor brand Cups - 13N08.