Canon YA2-4645 Water Protect Ring
Canon YB2-0411 Lens Mount
Genuine Canon lens mount for the NON CMT (Canon Made Taiwan) EF-S 18-55 3.5-5.6 DC / EF-S 18-55 3.5-5.6 II / EF-S 18-55 3.5-5.6 USM and EF-S 18-55 3.5-5.6 USM II lenses. Please note: Look on your lens mount and if "Made in Taiwan" is not printed there, you need this lens mount. If your lens mount does show "Made in Taiwan" you need the lens mount listed here. This mount only fits lenses listed and does fit any STM lens. Ironic this lens mount is Made by Canon Taiwan.
Canon YB2-0678 Lens Mount
Canon YB2-0738 Zoom Encoder
Canon YB2-0804 Guide Collar
Use option to choose from available sizes. 
Canon YB2-0889 Scale Window
Genuine Canon scale window for the EF 24-105 4.0 L IS USM lenses. Made by Canon Japan.
New tape is recommended when installing this window, available here.
Canon YB2-0891 SW-Panel Tape
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 YB2-1493 Guide Collar
Canon YB2-2090 Scale Window
Genuine Canon scale window for the EF 70-200 2.8 L II IS USM lenses. Made by Canon Japan. We recommend using new tape when installing this window, available here.
Canon YB2-2862 2mm x 6mm Screw
Canon YB2-3788 Lens Collar
Canon YB2-4656 Lens Mount
Canon YB2-5271 Lens Mount
Canon YB2-5525 Lens Mount
