This is a an idler pulley that goes on mower deck on the following lawn mowers. Please note the tractor and deck combinations listed below you must have an exact match for this part to work for you.
IT FITS: LT166 WITH 48C DECK LT180 WITH 48C DECK LTR155 WITH 42" DECK LTR166 WITH 42" DECK LTR180 WITH 42" DECK
S1642 S1742 1438 1538 1542 15.542 16/42 1742
44" SNOWBLOWERS X300 SERIRES AND X500 X570
47" SNOWBLOWERS ON WITH SERIAL NUMBERS ABOVE 010672+ X530 X534 X540 X580 X590