Canon YA2-0124 Friction Rubber
Canon YA2-2062 EF Collar
Canon YB2-0433 Rubber Mount
Canon YB2-0765 Zoom-Ring Rubber
Canon YB2-2458 Lens Collar
Canon YG2-2169 Power Diaphragm
Genuine Canon power diaphragm assembly for the EF-S 17-85 4-5.6 IS USM lenses. Made by Canon Japan. Please note. Many times the power diaphragm unit is fine, just the FPC has broken connections. We sell the power diaphragm FPC separately, here.