Lens Hood 2pc, 180mm (7.09in) long. Replaces Canon ET-138 hood.

Bayonet-mount 2pc lens hood kit. Replaces Canon ET-138 hood. Length: 180mm (7.09in). Maximum diameter: 172.5mm (6.79in). Extension beyond end of lens: 154.5mm (6.09in). Approximate weight: 344g (12.1oz). Fits Canon EF 500mm f/4L IS USM. Sections are 98mm (3.86in) long. Handling a two-piece hood: https://youtu.be/laydgwmaQG4