Movo Photo EW-83E Lens Hood for Canon EF 16-35mm f/2.8L USM, 17-40mm f
Amazon.com : Fotodiox Lens Hood Replacement for EW-83E Compatible with Canon EF 16-35mm f/2.8L and Other Canon Wide Angle Lens : Camera Lens Hoods : Electronics
Reversable EW-83E EW83E Lens Hood for Canon EF 16-35mm f/2.8 L USM 17-40mm EF-S 10-22mm Bayonet Camera lens accessories - AliExpress