... industry,plastic hard ware,scent bottle sprayer,valve,nail polish,air condition,medical material,automotive ... Stainless steel is a type of modern steel and famous for its high corrosion resistant, wear resistance ... element bearings, valve seats, casters, ball bearings and valve parts.420C is a martensitic stainless steel with 12% ... Information,Plz contact us! 8mm High Quality Stainless steel ball