Consists of:2 x Board Mounting Brackets2 x Slimline II Rack Latch Brackets1 x Pair of Stratchits1 x Pair of Tie Down RingsInstallation HardwareFitting InstructionsMaterials used:Black powder coated high strength steel304 Stainless SteelFoam PadRubberProduct Dimensions:Outer Dimensions (Single Holder):559mm (22'') L x 85.5mm (3.4'') W x 98.5mm (3.9'') HOpen Dimensions (Single Holder):161mm (6.3'') L x 85.5mm (3.4'') W x 445mm (17.5'') HWeight:3.4kg (7.5lbs)