... appearance and practical usage.3.The screen surface is white and flat, with high gain, smell-free, moisture-proof, mildew ... large-scaled show stage, ect.5.Projector screen ParameteMatte white screen: Viewing angle is 50°and Gain is 1 ... 221*9*97.58.5 Glass beaded screen/ Matte white screen 120" 240*180 266*9*91011.5 ... Glass beaded screen/ Matte white screen 150" 300*220 326*9*915.517.5 ...