spherical roller bearing : GE...ES , 1) high precision . 2)Low noise and high quality . 3)Fast delivery . Spherical plain bearing sizes : inner sizes : 4mm-260mm outer sizes : 12mm-400mm , high precision. 1),Material:Bearing steel,GCr15 . 2).Series:GE.ES,GE.ES-2RS,GE.G.ES,GEG.ES-2RS 3)Self-lubricating. Spherical plain bearing,our company can supply as your requirement .