large steel balls features a high quality mirror polished finish. The high reflective surface will bring you tons of visual impact for your garden or public art design.made from durable AISI304 grade stainless steel alloy.We can also offer these hollow steel balls in an #316 stainless steel alloy if your project calls for a material with a higher resistance to corrosion for ocean beach projects. These large steel balls are perfect for Architectural and landscape design projects or use in public Garden Art Metal Balls.