OEM Replacement Belt / Exmark 103-5589Pack Size:1Exmark 103-5589J. Thomas BT603, J. Thomas BT-603, Landscaper Express 1035589, NHC 230-4192, Stens 265-191Exmark Lazer Z HP with 52" deckBelt Application: Pump drive, Type: Cogged, Width: 1/2 ", Length: 51 5/8 "