IDLER PULLEY 20 TEETH FOR RIDE-ON MOWER LAWN MOWER COMPATIBLE LAWN MOWER CASTELGARDEN TECHNICAL CHARACTERISTICS MODELS TC 122 OUTER DIAMETER 55 mm INNER DIAMETER 31/35 mm HEIGHT 31 mm CODE: 31270019 ORIGINAL CODE: 125601561/0 , 25601561/0 , 1136-0913-01 SR