Lens Hood 1pc, 163mm (6.42in) long. Matches Canon ET-155 hood dimensions. (MK I, RF)

Bayonet-mount 1pc lens hood kit. Matches Canon ET-155 hood dimensions. Length: 163mm (6.42in). Maximum diameter: 180mm (7.09in). Extension beyond end of lens: 139mm (5.48in). Approximate weight: 313g (11.1oz). Fits Canon EF 400mm f/2.8L IS USM, RF 400mm f/2.8L IS USM, EF 800mm f/5.6L IS USM.