Canon YB2-0033 Zoom Collar
Genuine Canon Zoom Collar for the EF 16-35 2.8 L USM, EF 16-35 2.8 L II USM, and EF 17-40 4.0 L USM lenses. Package of 1 collar. Made by Canon Japan. The screws used to retain this collar are in stock here.
Canon XA1-1200-559 EF Screws
Canon YB2-1080 Distance Window
Canon YB2-0943-399 Guide Collar
Canon YG2-2332 USM Assembly
Canon CY3-2004 Scale Window
Genuine Canon replacement 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.