4K ALR Black crystal Acoustic transparent soft PVC Ultra-thin bezel aluminum alloy fixed frame. Screen Material Features: Ratio: 16:9 Screen material Gain:0.8 View angle:160 degree Material hole diameter: 0.45mm Screen material Thickness:0.31mm Fabric material Colour: Dark grey (front and back) Support: 4K and active 3D projectors *We recommend getting a professional AV installer to set up this high-quality screen.*