Canon YB2-0943-399 Guide Collar
Canon YB2-1243 Lens Collar
Genuine Canon lens guide collar for the EF 70-200 4.0 L IS USM lenses. Package of 1 collar. Use the guide and measure your collar and select the proper size replacement. Use the option to choose from available sizes.

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This product has multiple variants. The options may be chosen on the product page
Canon YB2-1246 Window Tape
Genuine Canon scale window tape for the EF 70-200 4.0 L IS USM focus scale window. The window used with this tape, in stock here. Made by Canon Japan.
Canon YB2-1326 Collar Screw
Genuine Canon screw to retain all sizes of collar YB2-1328 for the EF 16-35 2.8 L II USM lenses and other Canon imaging products. Package of 1 screw. Made by Canon Japan.