John Deere seat spring set M146683 GT235 GX255 GX325 GX345 LX266 LX280 SST16 New set of seat springs that fit the following John deere lawn and garden units CS AND CX GATORS UNDER SERIAL # 039999, GT225, GT235, GT245, GX255, GX325, GX335, GX345, GX355, LX255, LX266, LX277, LX279, LX280, LX288, LX289, SST15, SST16, SST18, X465, X475, X700 TRACTORS 325, 335, 345, 355D, AND 425 TRACTORS WITH SERIAL #S 070001 AND ABOVE. THESE ARE EASY TO REPLACE. THANKS FOR LOOKING