... Razor sharp edges. It is being used in rolling element bearings, valve seats, casters, ball bearings and valve parts.420C is a martensitic stainless ... include their use in the chemical, paper and textile industries (valves, pumps and bearings).OUR MAIN PRODUCTS:Stainless steel ball:AISI302,304,316 ... ,G40,G25,G18,G16,G14,G12,G10Any further Information,Plz contact us! 8mm High Quality Stainless steel ...