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Product name: Precision Machined Density Cubes:tungsten cube,copper cube,niobium cube,nickel cube,titanium cube Product features Purity:Nickel, titanium: 99.5% Copper, tungsten, niobium: 99.95% Engraved Element Periodic Table Product description Material: Niobium, Nickel, Copper, Titanium and Tungsten Metal Item Weight: Nickel: 8.64 Grams(approximate) Titanium: 4.57 Grams(approximate) Copper: 8.9 Grams(approximate) Tungsten: 19.25 Grams(approximate) Niobium: 8.58 Grams(approximate) Size: 10 mm x 10 mm x 10 mm ; Surface quality: Fine ground; Number of Items: 1 Range of application: element collection, education, gift and so on.