Used on the following models:

Sole Fitness
F83 583887
2006 Series - F85 (585881)
2009-2010 Series - WF85 (585888)
2011 Series - AF83 (583810)
2011 Series - AF85 (585810)

Spirit Fitness
X Series Motorized Treadmill - XT200 - 2005-2010
XZ600
Z Series Treadmill - Z500 - 2004-2006