【4x5.65" Square Filter for Matte Box】 The 4"x5.65" square filter is compatible with Tilta SmallRig matte box and mini matte box. Simply put the filter on a matte box and place the whole set in front your camera lens, and then get the hazy cinematic look for professional photography and videography | 【1/4 Black Diffusion Filter for Cinematic Effect】The 1/4 stop black diffusion filter effectively reduces highlights and lowers glare to deliver smoother and softer skin tone for dreamy cinematic effect on video and photo image. Ideal for portrait photography, video recording, and vlogging | 【HD Optical Glass Build】Built with HD optical glass, the filter delivers high clarity pictures without compromising image quality and minimizes reflections from the filter itself. The square shape filter eliminates vignetting issue common to circular filters. No color cast | 【Multi Nano Coating Protection】The filter provides solid protection against scratches, water, oil, dust, and fingerprint with double sided 28 layers of Nano coatings. Use the included cleaning wipe to clean the filter with ease | 【Super Slim & Lightweight】 0.16"/4mm thick and weighs only 5.12 oz/147g. This ultra slim and lightweight filter adds barely noticeable weight to your filming setup when mounted on. Store it in the carrying case for safekeeping and easy carrying