Haida Slim PROII Multi-Coated Grad ND8 Filter. High Quality ProII Slim Glass Split Gradual Graduated Neutral Density Filter ND 0.9 ND8. 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.