The Lee 100mm Neutral Density (ND) 0.3 Graduated Very Hard Filter Set contains three 100x150mm graduated resin filters (0.3, 0.6 and 0.9) that allow the photographer to adjust exposure (by 1, 2 and 3 stops) over part of the image without affecting colour balance. The Very Hard ND grad is perfect for scenes such as seascapes that feature a defined horizon line. The transition between the coated and clear sections of the filter is extremely sharp, allowing for precision separation between the filtered and unfiltered areas of the frame. The Lee 100mm Filter Holder (i.e. Foundation Kit) and an Adapter Ring are required, not included.