Prevent glare and lens flare caused by unwanted light.Protect your lens from minor impact.Petal Bayonet mount design firmly attaches hood on lens.Bayonet Hood allows wider angle than the round hood.The lens hood provides a cost-effective solution to the problems caused by sun glare rain and wind-blown debris and is also valuable in providing protection against knocks and damage.Color: BlackMaterial: plasticInner Diameter: Approx. 70mm/ 2.76inchOverall Size: Approx. 93x35mm/ 3.67x1.38inchCompatible With: For EF-S 10-18mm F/4.5-5.6 IS STMPackage Included: 1 x EW-73C Bayonet Mount Lens Hood For Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.