... 300-500)MM 2,Appearance: silver gray and metallic luster W1 W2 Tungsten block 99.95% Appearance: silver gray and metallic ... Each Element WAL1,WAL2 ≥99.95%≤ 0.05%≤ 0.01% W1 ≥99.95% ≤0.05%≤0.01% W2 ≥99.92% ≤0.08% ≤0 ... .01 %Note: potassium is not counted in the impurity contentWe ... .Please contact with our sales department for more details. W1 W2 Tungsten block 99.95%