This is the Treadmill Doctor Crank Bushing Sleeve for the Nordictrack Audiostrider 800. Model Number: 831.236670. Part Number: 344602. Fits the following models: GGEL681080 , HREL598080 , NTEL082120 , NTEL082121 , NTEL098090 , NTEL77060 , NTEL77061 , NTEL79060 , NTEL79061 , NTEL79062 , NTEL79063 , NTEL79064 , NTEVEL990070 , NTEVEL998130 , PFEL180120 , PFEL180122 , PFEL779080 , PFEL779082 , PFEL779083 , PFEL979100 , PFEL979180 , PFEL979182 , RBCCEL779100 , RBEL079130 , RBEL607080 , RBEL607081 , RBEL779090 , RBEL99060 , RBEL99061 , RBEL99062 , RBEL99063 , RBEL99064 , RBEL99065 , 236670 , 236671 , 236672 , 236690 , 236691 , 236692 , 236693 , 236694 , 238970 , 238971 , 307080 , 307082 , 307250 , 307252.