... PureTungsten products:tungsten powder,slab,bars,rolling plate,sheet,rods(electrode), wire, crucible,boat, ring, funnel,etc Size ... -301200Φ30-601000Φ60-70800Φ70-90600Appearance: rolling rods: Dark brown, the surface is smooth and straight ... (crackle, heavy skin, hole, trough, etc) ;Electrode rods: Bright silver gray metallic luster. (process according to user' ... vaccum parts, etc >99.99%Tungsten welding rods