The Blue Grad Kit includes the popular soft edge grads in densities 1, 2 and 3. Blue color grad filters create a realistic cooling blue effect. It enhances the blues of water and skies and is a vital tool in your landscape filter armory. Soft edge grads have a smooth transition from clear to the color. Different graduated color filters can be used in combination together or with solid color or neutral density filters to give interesting bespoke effects. Formatt-Hitech filters are made from the highest quality 1.5mm optical resin. This filter kit is available in 67mm, 85mm and 100mm sizes.