GE30ES-2RS Double Sealed Spherical Plain Bearing One Bearing GE30ES-2RS Double Sealed Spherical Plain Bearing, the inner race can swivel like a ball joint, the inner diameter is 30mm, outer diameter is 47mm and the width is 22mm, this is a popular size that could be used in many applications, bearing has 2 Rubber Seals to protect the bearing from dust or any possible contamination.