Material:AISI304,316,420C,440C Size:0.8mm-150mm ... scent bottle sprayer,valve,nail polish,air condition,medical material,automotive fittings.Material Composition % MaterialCSiMnPSNiCrMoAISI3040.07 max1.0 max2.0 ... 420 steel is magnetic and welding is not recommended. Material will not pass the 72 hours salt bath test. ... ,G12,G10Any further Information,Plz contact us! 8mm High Quality Stainless steel ball