oil seal: 1.1M8747,7T0158,9W6666,9W7211,9W6668,6T8440 2.ES110,ES250,ES95,ES150,ES64 3.size:50-1,000mm 4.Gcr15 oil seal: Oil seal used in construction machinery and mining machinery , the outer diameter is from 50mm-1,000mm. The material is chrome molybdenom casting iron. The hardness is HRC58-62 , the working face precision within 0.015um , flatness up to 0.1um-0.2um ,the lifetime is more than 3, ...