Lee Filters 4x6 Graduated Neutral Density Medium Edge Set for 100mm System (includes 0.3, 0.6 and 0.9) [FHNDGMS] Lee Filters 100x150mm Neutral Density Medium-Edge Graduated Resin Filter Set - Filter Wrap for 3 Filters - Lee Filters Lifetime Limited Warranty Compatibility: 100mm System Filter Holder Edge Blending: Medium Thickness: 0.1" / 2.54mm Density: Up to 0.3Up to 0.6Up to 0.9