X384 X390 X584 X580 X590 54". fits John Deere M155096 secondary Deck Drive HEX Belt X300R X305R 42" cut Deck. fits JOHN DEERE SECONDARY DECK BELT 335 345 355D GT242 GT262 38" cut ONLY. fits JOHN DEERE SECONDARY 38" cut DECK DRIVE BELT GT262 GT275 GX325 GX335 GX345.