Bayonet-mount 1pc lens hood kit. Matches Canon ET-120B hood dimensions. Length: 125mm (4.92in). Maximum diameter: 144.5mm (5.69in). Extension beyond end of lens: 104.75mm (4.12in). Approximate weight: 475g (16.8oz). Fits Canon EF 400mm f/4 DO IS USM, EF 300mm f/2.8L IS USM, EF 200-400mm f/4L IS USM.
