John Deere Original Equipment Extension Spring - M141788 
This fits John Deere compact tractor models: 1025R, 1026R
Gator models: 4X2HPX & 4X4HPX Diesel-Gas, 4X4HPX Trail Gas, 4X2 & 6X4 Diesl-Trail-Worksite gators, A3 Military, E-Gator Turf (1999-2005), Turff 4X2 (1997-2005), HPX615E, HPX815E, Military 4X4 A2 & A3, Military 6X4, TE gator, TH 6X4, TX/TX4X2, XUV620i, XUV625i, XUV825i, XUV850D, XUV855D,
XUV855D S4, XUV825E, XUV825M, XUV825M S4, XUV855E, XUV855M
Ridng mower models: X710, X730, X734, X738, X739, X750, X754, X758, X40, X948, X949
Ztrak models: Z645, Z655, Z665. 
This is a genuine John Deere part.