The Lee Filters 100mm Coral Filter Set contains three resin filters, ranging in strength from pale to mid-tone, that have a variety of uses. highlights Adds a warm, soft orange hue to your image Contains 3 Coral Graduated 100mm resin filters All filters have a hard graduated transition When placed across the sky, a warm, soft orange hue is introduced. Alternatively, when these filters are inverted it brings tone to the greenery in a foreground image. The higher the number in the Coral grad series, the further the colour temperature is corrected. The Lee Filters 100mm Coral Filter Set includes a Coral 2 Graduated, Coral 4 Graduated and Coral 6 Graduated. All filters have a hard graduated transition and are constructed from resin material.