Fotodiox 6x8-Orange-ND6SE Pro 6.6 x 8.5 Inches Graduated Density 0.6, 2-Stop Soft Edge Filter, works with WonderPana 66 FreeArc System (Orange) Premium grade optical polycarbonate (CR39) filter High quality, super thick, gradient filter Adds warmth and definition to both sky and landscape Enhances the natural colors created by sunsets 24 Month Manufacturer Warranty