Used, good working condition.  John Deere fuel cap.  Deere part no. AM137724 (old no. AM122880.  Fits LT100s, LX255, SST15, SST16, SST18, 325, 335, 345, LT150, LT160, X300, X304, X320, X324, X360, 400 SERIES GAS, X700, X720, X724, X728, X729, Z200 SERIES, Z400 SERIES EASY TRAK, X465, X475, X485, X575, X585, X500, X520, X530, X534 and X540.