Cokin P System Compatible Graduated Neutral Density ND Filter and ND Filters Kit Set Graduated Neutral Density ND filters provide a gradual color transition for a smooth blending effect. Give your landscape and skin texture a more colorful touch Neutral Density (ND) filters can reduce the intensity of light without appreciably changing its color Allow user to apply slow shutter speed under sunlight exposure, large aperture is available to create depth of field easily The carrying case allows user to store 6pcs Cokin P filters, or round filters (up to 82mm)