2512 Siliceous Fossil Meals, E.g. Kieselguhr, Tripolite and Diatomite, and Similar Siliceous Earths, Whether or not Calcined, of an Apparent Specific Gravity of <= 1

2512 (01/1988-..) Siliceous Fossil Meals, E.g. Kieselguhr, Tripolite and Diatomite, and Similar Siliceous Earths, Whether or not Calcined, of an Apparent Specific Gravity of <= 1 25120000 (01/1988-..) Siliceous Fossil Meals, E.g. Kieselguhr, Tripolite and Diatomite, and Similar Siliceous Earths, Whether or not Calcined, of an Apparent Specific Gravity of <= 1