(JG091-01) Each box is made up of a set of ball guide rings and 1 ball bearing with bore 50 / outer Ø. 80 mm D Code 90 - 110 - 120 ELJG091300 90 - 100 - 110 - 120 - 130 ELJG091500 90 - 100 - 110 - 115 - 120 - 125 - 130 ELJG091700