Haida Slim PROII Multi-Coated Grad ND 8.0 Filter. High Quality Pro II Slim Glass Split Gradual Graduated. Neutral Density Filter ND 0.9 ND8 to 0. High quality optical glass. Darken sky to bring out detail in landscapes. Equally effective in color or black and white photography. Circular Rotating Design. No color cast. Double threaded to allow stacking. Includes plastic case.