... high quality products!2) We used high quality GCR15 bearing steel to make sure it's rigidity and metallographic structure all reached ... structure200E10-1200N,NF,NJ,NU,NUP300E10-1200N,NF,NJ,NU,NUP400E260-800N,NF,NJ,NU,NUP100010-1000N,NF,NJ,NU,NUP2200E10-1000N,NF,NJ ... ,NU,NUP2300E10-1200N,NF,NJ,NU,NUPNN300030-1200K ...