Aluminum balls could be used for interior/exterior decoration or ornaments. Since Aluminum is light, it is thus popular material for lamp cover. Unlike stainless steel, aluminum is rarely applied in large outdoor sculpture,

Aluminum balls are corrosion resistant and light in weight. Aluminum balls are available in a range of sizes and tolerances (grades).

However, for polished aluminum spheres, the surface gets less shiny when a sphere gets bigger. Also in most cases, the surface of aluminum sphere will get less shiny by day, but for aluminum hemispheres, the surface could be mirror polished in the long run.