... chemical industry,plastic hard ware,scent bottle sprayer,valve,nail polish,air condition,medical material,automotive ... being used in rolling element bearings, valve seats, casters, ball bearings and valve parts.420C is a martensitic stainless ... 304/304L series, but they can be anti-magnetic and, above all, the addition of molybdenum ... Information,Plz contact us! 8mm High Quality Stainless steel ball