Canon YG2-2080 Front Sleeve
Canon CY3-2202 Fixed Sleeve
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.
Canon YB2-1305 Name Ring
Canon CY3-2004 Scale Window
Genuine Canon scale window for the EF 16-35 2.8 L USM and EF 16-35 2.8 L II USM lenses. Made by Canon China. New tape is recommended when installing this window, available here.