\nThese extension brackets will work to fit a Front Runner Rack to vehicles with a gutter to gutter distance between 1450mm (57.1'') and 1785mm (70.3''). For example, a 1475mm wide Slimline II Rack can now fit a van's roof up to 1785mm (gutter to gutter) wide. \nExtension brackets bolt underneath the slats of Front Runner Rack and Front Runner Legs are fitted to the end of the extension brackets. \nMade from steel plates and high strength steel and finished in the same durable black powder coating as the Slimline II rack. \nSupplied with installation hardware and fitting instructions.