Ho2O3 99.9% 1.Ho2O3 99.9%, REO 99.0% 2.REO Impurity Max 0.1% 3.Other Impurity Fe2O3 0.01%, SiO2 0.01%, CaO 0.01%, Cl- 0.02% Ho2O3 99.99% 1.Ho2O3 99.99%, REO 99.0% 2.REO Impurity Max 0.01% 3.Other Impurity Fe2O3 0.0005%, SiO2 0.003%, CaO 0.005%, Cl- 0.02% Packing 10kgs in plastic bags with vacuum package