... steel materialJapan NSK Deep Groove Ball BearingOur main products include deep groove ball bearings,miniature thin-wall bearings,and different types of low ... noise,non-standard and special bearings.(1)Bore ... ,6904,6905,6906,6907,6908,6909,6910 16000series:16001,16002,16003,16005,16007(3)Sealing form:OPEN,Z,ZZ, ...