The Hitech Color Graduated Camera Filter Kit 4 - Coral 1/ 2/ 3 - 100 x 150mm is a package of 3 hard-edged color graduated Coral filters, of density 1, 2 and 3. They are pale pink filters that can be used for both color correction and color effects. They are also great for warming cool lighting situations, such as overcast days.
Color graduated camera filters create an effect in the top half of your photo and leave the bottom half alone. They are most commonly used on skylines for landscape work. These hard-edged filters have a defined hard line transition, as opposed to the smooth transition from clear to color provided by the soft-edged type.