Item Type: Multi Coated 3 Piece Filter Kit Model: UV Protective Lens Filter / CPL Lens Filter / FLD Lens Filter Material: Aluminum Alloy + Optical Glass Product Color: As Pictures Shown Product Weight: Approx. 70-76g / 2.5-2.7oz Package List 1 x UV Lens Filter 1 x CPL Lens Filter 1 x FLD Lens Filter 1 x Filter Storage Bag 1Aluminum Frame: Adopting high quality aerospace aluminum alloy, the filters have high toughness, resistance to deformation, corrosion resistance, and good processing performance. 218 Layers of Double Sided Coating: 16 layers of antireflection film, 2 layers of waterproof film effectively reduce the reflection of the filter surface and the glareand ghost caused by light reflection during long exposure. 3Perfect Waterproof Performance: The two layer waterproof film makes the lens surface smooth and not easy to be stained, and effectively protects the lens. It is suitable for photographers to create in harsh environments. 4UV Lens Filter: UV lens filter can weaken the blue tint caused by ultraviolet rays and improve the clarity and color reproduction effect. 5FLD Lens Filter: FLD lens filter is often used in landscape shots to bring out a dreamy purple effect. 6CPL Lens Filter: CPL lens filter is a commonly used filter that eliminates unnecessary reflections and can eliminate most of the reflections on non metal non spherical surfaces. It is generally used for landscape photography. The sky is bluer when shooting. When shooting water, it can eliminate water reflections and shoot the scenery under the water, so that the whole picture is clearer and more transparent.