... Diameter:300-5000mm Large metal sphere,outdoor decorative sphere,stainless steel hollow sphere:Ideal for Water pressure machine,tanks,outdoor ... touches.3. Packing ,by wooden crate/steel crate.4.Materil Comparison,304 stainless steel ball is softer and can be ... pocessed more easily than 420stainless steel ball,while 316L stainless steel ball has stronger antirust and anticorrosive capability ...