Canon Lens Hood EW-73B

One of the most important accessories for each lens you own. A lens hood provides multiple functions: it shades the lens from stray light, improving your contrast and image quality; in inclement weather, it can assist in keeping moisture or wind-blown debris off the lens; and it protects the front barrel from the inevitable impacts against walls, door frames, and other real-life obstacles

Canon EF-s 17-85mm f/4-5,6 IS USM
Canon EF-s 18-135mm f/3,5-5,6 IS USM