Brand and Type: Canon screw-in protective filter. Size: Compatible with 58mm diameter lenses. Function: Protects the lens from scratches, dirt, and water droplets, while maintaining clear image quality without compromising color balance. Installation: Screw-in type, so it can be easily attached to most 58mm lenses. This is a type of lens protection filter that can be attached to 58mm diameter lenses. Although it is unused, please understand that it has been stored at home by a non-professional.