This is the replacement walking belt for the Horizon DT650 Treadmill. Fits the following models: Horizon, Digital Series - DT650 - 2006 (TM165), Digital Series - DT680 - 2007 (TM198), Freespirit - 30410 - 2005 (TM123), Freespirit - 30516 - 2006 (TM191), HZ Series - T51 - 2005 (TM116), HZ Series - T61 - 2006 (TM156), HZ Series - T71 - 2007 (TM204), Limited Series - T605 - 2005 (TM120).