LR6001NPPU Track Roller 2-Row Bearing Sealed 12x30x8mm Track BearingLR6001NPPU Track Roller Double Row Ball Bearing 12mm x 30mm x 8mm One Bearing LR6001NPPU Track Roller Double Row Ball Bearing, bearing is a Sealed, Bearing inner diameter is 12mm, Bearing outer diameter is 30mm and Bearing width is 8mm. LR6001NPPU Bearing Track Roller Double Row Bearing Size: 12mm x 30mm x 8mm Bearing inner Diameter: 12mm Bearing outer Diameter: 30mm Bearing width : 8mm Dynamic Load Rating Cr: 4300 N Static Load Rating Cor: 2100 N