... row tapered roller bearing,double row tapered roller bearing ,deep groove ball bearing,cylindrical roller bearing,automobile tensioner bearing and bearing wheel kits).Please ... 60 series, 62 series, 63 series and VKBA series (bearing weel kits)2)Material:Gcr15(Chrome steel)--China3)Shield/Closure ... of deep groove bearing:Plain(Open),Z,ZZ,RS,2RS4)Vibration and ...