This is a Treadmill Doctor Replacement Matrix Deck Part Number 1000421981 Used on the Following Models Listed Below.  

Matrix -
T4 - T4-G1 - 2002-2004 (MTM69) 
T5 - T5-G1 - 2002-2004 (MTM65) 
T5x - 2012 (FTM501E, CTM501D) 
T5x - T5x - 07 - 2013 (FTM501E, CTM519) 
T5x - T5x-04-G4 - 2009-2010 (FTM501C, CTM501C) 
T5x - T5x-05-G2 - 2005 (MTM65C) 
T5x - T5x-06-G3-110 - 2006-2008 (TM65D) 
T5x - T5x-06-G3-220 - 2006-2008 (TM65D) 
T7x - 2012 (FTM501E, CTM502D) 
T7xe - 2012 (FTM501E, CTM503F, CTM503G) 
T7xe - T7xe-01-G4 - 2009 (FTM501, CTM503) 
T7xe - T7xe-02-G4 - 2009-2010 (FTM501C, CTM503D) 
T7xe - T7xe-03 - 2013 (FTM501E, CTM520, CTM520B) 
T7xi - 2015 (FTM501E & CTM521D) 
T7xi - T7xi-02-G4 - 2009-2010 (FTM501C, CTM502C) 

 *** This Replacement Deck Will Come With the Holes Predrilled. Please call 888-362-1105 to confirm installation recommendations.