... , outer sizes :14-400mm . 1:Material:Bearing steel,GCr15 2:Self- lubricating. Spherical plain bearing : high precision , inner sizes: 4-260mm ... , outer sizes : 14-400mm .A:Material:Bearing steel,GCr15 B:Series:GE.ES,GE.ES-2RS,C ... Self-lubricating Spherical plain bearing,our company can supply the different types and the different size for each type. spherical plain roller bearing