"The Tilta 4 x 5.7"" Carbon Fiber Matte Box easily mounts onto 19mm rails via its 19mm rod adapter. It features two 360deg. rotating filter holders of 4 x 5.65"". The lightweight carbon fiber construction adds very little weight to your system and the swing away design allows you to make quick lens changes and simply move the matte box away from your lens when you're not using it without having to detach it from your system.The matte box also comes 80, 90, 114 and 134mm lens adapters to fit most telephoto lenses and three flags to reduce side flare.|19mm rod adapter to easily mount to industry-standard 19mm camera support systems|Swing away design allows you to move the matte box away when not in use and allows for easy lens replacement|Two 360deg. rotating filter holders to add 4 x 5.65"" polarizing or graduated filters to your system|French flag and side wings protect your lens from flare|80, 90, 114 and 134mm lens adapters for use with a wide range of lenses"