Genuine Canon lens mount screws for the EF 300 2.8 L USM, EF 400 2.8 L II USM, EF 400 2.8 L IS USM, EF 500 4.0 L IS USM, EF 500 4.5 L USM, and EF 600 4.0L IS USM lenses and other Canon imaging products. Package of 2 screws. Made by Canon Japan.
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