... 3.best service 4.high precision Miniature Ball Bearing1. Basic Feature: 1) Shield / closure: OPEN, Z, ZZ, RZ, 2RZ, RS, 2RS 2) Tolerance codes: ABEC-1, ABEC-3 ... Size: From 1mm to 10mm 8) Outside Diameter: From 3mm to 30mm 2. Type: Model: 1) Metric ... groove ball bearing,angular contact ball bearing,spherical roller bearing,taper roller bearing and cylindrical roller bearing,pillow block,rod ends bearing ...