John Deere Original Equipment Extension Spring - M158756
John Deere Original Equipment Extension Spring - M158756 Specifications: End Type 03/03, Wire Diameter 0.138 IN, Outside Diameter 1.024 IN, Free Length 6.772 IN, Spring Rate (LBF/in or N/mm) 27.123LBF/IN, Initial Tension (LBF or N) 23.605 LBF, Number of Coils 28.000 Unity, Material A15-7, Finish U, Note D. Fits the following John Deere models: 54D, 60D, 1023E, 1025R, 260, 1026R, 2, 59, 46, X700, X565, 25GA, 175, 15, X720, 47, 10000, X72, X485, 42, 10, 47SB, 647A, X495, 46ST, 7, X465, X585, 45, 48, X749, X475, 15GA, X744, 51RB, 40GA, X575, 450, 51, 125, 80, X748, 9X740, 60, X728, 647, 25, 40, X724, 54FB, 54, 42HT, X595,72D, 62, 54D, 60D, 72, 62C, 54C, 62D, X300, X300R, X304, X305R, X310, X320, X324, X330, X340, X350, X350R, X354, X360, X370, X380, X384, X390, X394, X500, X520, X530, X534, X540, X570, X580, X584, S590, Z425, Z445, Z465. This is an O.E.M. John Deere part. Thanks for looking!