electrical bearing can be used in automobile,precision machinery ... 19 mm;Precision Rating: ISO Class 6/ ABEC-3/ DIN P6/JIS Class 6;Type of Retainer:Center-punch riveted ... Open1- electrical bearing :60,62,63 series with open,Z,ZZ,RS,2RS,NR available2.material:chrome steel3.quality certification: ... delivery,OEM available7.Advantage:competitive prices with excellent quality High Quality electrical bearing