Features: The ET67 Lens Hood is to effectively block strays light and reduce unwanted lights,enhancing your photos. From durability ABS this Lens Shade effectively blocking scattered light, the light shielding covering internal extinction treatments. When taking photos with backlighting, side lighting,it can prevent not imaging light from entering and avoid fog. During forward and side light photography, scattered light from the surrounding area can be avoided from entering the lens. It can prevent accidental damage to the lens and also prevent fingers from accidentally touching the surfaces of the lens. Specifications: Item: ET67 Lens Hood for EF 100mm f/2.8 Macro Lens Mount Component：ABS Package Includes: 1PC Lens Shade note: (Camera ,lens and others not included) Due to the problems of lighting effects there will be certain tolerances in the product, please understand. Please allow 0-1cm error due to the manual measurment.