1.stainless steel deep groove ball bearings 2,Competitive price 3,Quick delivery,good service 4, ... has better corrosion and magnetic resistance. All Austenitic stainless steel bearings are made of AISI SUS316L (316) or SUS304 material, ... better corrosion resistance than 440C stainless steel bearings, but they are cheaper than 316 stainless steel bearings. Stainless steel deep groove ball bearings