1.taper roller bearing 2.Model No. :6000 series. 3.Brand as customers ... be acceptable. 5.longer life SKF 6204 deep groove ball bearing Deep Groove Ball BearingBrandSKF, NTN, NSK, Koyo, KOOEMCustomization ... 63143.shield/closure;open bearing ,z,zz,RS,2RS,4.snap ring:N,NR5.Material:GCr15--china,(AISI) 52100--America ... Tools.Sport Apparatus,Office equipment, Agriculatural Machines,etc taper roller bearing