Genuine Canon fixed sleeve assembly for the EF 17-40 4.0 L USM lenses. Made by Canon Japan.
This sleeve assembly includes the MF/AF switch FPC and the scale window.  Those parts are not available separately from Canon.
Genuine Canon guide collar for the EF 28-300 3.5-5.6 L IS USM lenses.
First, measure the collar you have and find the appropriate size using the chart below.
Use option to choose from available sizes.
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