This is the replacement motor drive belt for the Nordictrack C 900 PRO Treadmill. Model Number: NTL990112. Part Number: 317055. Fits the following models: EPTL140120 , EPTL141120 , EPTL190120 , EPTL209120 , NETL197130 , NETL257113 , NTL122122 , NTL170110 , NTL170111 , NTL290122 , NTL990105 , NTL990106 , NTL990110 , NTL990111 , NTL990112 , NTL990113 , NTL990114 , NTL992120 , NTL992121 , RBTL140130 , RBTL140131 , RBTL190130 , RBTL990130 , RBTL990131 , RCTL990130 , SFETL158130 , SFTL135120 , SFTL195110 , SFTL195111 , SFTL195112 , SFTL205120 , SFTL205121 , SFTL812132 , SFTL814130 , SFTL814132 , SFTL819130 , SFTL819131 , SFTL81913-INT0 , SFTL81913-INT1 , 249170 , 249490 , 249491 , 249492 , 249493 , 249494 , 249590 , 249895 , 249896 , 294500 , 298390.