This is the Treadmill Doctor Drive Belt for Nordictrack A2250. Model Number: NTL778061. Part Number: 248521. Fits the following models: CWTL056074 , ECTL097060 , EPTL097060 , EPTL097061 , GGTL096070 , GGTL096071 , HRTL917060 , NTL078060 , NTL078061 , NTL078062 , NTL078063 , NTL078064 , NTL078065 , NTL097073 , NTL108053 , NTL108054 , NTL150070 , NTL150071 , NTL169050 , NTL169051 , NTL190070 , NTL198060 , NTL778060 , NTL778061 , NTL778062 , PFTL727070 , PFTL727072 , PFTL795060 , PFTL795061 , PFTL795063 , PFTL912051 , PFTL912060 , PFTL998064 , RBTL071070 , RBTL071071 , RBTL071072 , RBTL099060 , RBTL099061 , RBTL145060 , SFTL815070 , SFTL822070 , SFTL822071 , 246670 , 246671 , 246672 , 246673 , 246674 , 246675 , 246770 , 246771 , 246772 , 296073 , 296074 , 296130 , 296131 , 307020.