6pk oregon mower blades compatible with 60" kubota pro decks zd323 zd326 z725 92-049 k5647-34340 k5647-97530 k5668-97530 replaces kubota 6pk oregon mower blades compatible with 60" kubota pro decks zd323 zd326 z725 92-049 k5647-34340 k5647-97530 k5668-97530