Lens Hood 2pc, 125mm (4.92in) long. Matches Canon ET-138 hood dimensions.

Bayonet-mount 2pc lens hood kit. Matches Canon ET-138 hood dimensions. Length: 125mm (4.92in). Maximum diameter: 172.5mm (6.79in). Extension beyond end of lens: 99.5mm (3.92in). Approximate weight: 274g (9.7oz). Fits Canon EF 500mm f/4L IS USM. Sections are 70.5mm (2.78in) long. Handling a two-piece hood: https://youtu.be/laydgwmaQG4