The Cokin NUANCES Extreme kit includes 3 Graduated Reverse filters with 2, 3 and 4 f.stops max density. NUANCES Extreme filters are made of a highly resistant mineral glass, able to resist accidental fall and introducing innovative technology.A ne.w coating process ensures an uniform density and a nano metallic alloy is applied on both sides of a highly resistant tempered glass, resulting in a stunning neutrality. Nuances Extreme Reverse Grade ND4, ND8 and ND16 allow up to 2, 3 and 4 f.stops of light compensation with a soft transition from the middle of the filter to the top, effect of the filter is therefore less marked than on soft Grade filters. Round corners and 2,3mm thickness makes Nuances Extreme filters easier to insert in extreme conditions. COKIN recommends the use of EVO filter-Holder to ensure an efficient light-leaks protection.Specs:- Filter Type: Graduated ND- Graduation Type: Reverse- Graduation Direction: Vertical- Density: 0.3 (1 Stop) to 0.6 (2 Stops), 0.6 (2 Stops) to 0.9 (3 Stops), 0.9 (3 Stops) to 1.2 (4 Stops)- Shape: Rectangle- Cokin Compatibility: Cokin X-Pro- Filter Thickness: 2.3 mm- Rectangular Size: 13cm x 17cm- Filter Material: Glass- Coatings: Multi-CoatingIn the Box:- 3x Cokin NUANCES Extreme Graduated filters with individual pouch (ND4,ND8,ND16)- 1x Microfiber Cloth- 1x Light-Blocking Gasket