Lens Hood 1pc, 178.5mm (7.03in) long. Matches Canon ET-138 hood dimensions.

Bayonet-mount 1pc lens hood kit. Matches Canon ET-138 hood dimensions. Length: 178.5mm (7.03in). Maximum diameter: 163mm (6.42in). Extension beyond end of lens: 153mm (6.03in). Approximate weight: 305g (10.8oz). Fits Canon EF 500mm f/4L IS USM.