SPRING TORSION, DECK IDLER TENSIONER Z400/400X Product DescriptionSPRING TORSION, DECK IDLER TENSIONER Z400/400XProduct InformationFits to model (5)Zero-Turn MowersHUSQVARNA Z454XHUSQVARNA Z460XZero-Turn Lawn MowersHUSQVARNA Z460HUSQVARNA Z454XSHUSQVARNA Z460XS