Elitescreens 170 Manual Projection Screen M170XWS1 Feature: Dual wall and ceiling - perfect for home / business Designed for wall or ceiling installation Advance auto locking system - easy lock to all position Available in Black or White case color Black back screen material - block rear light through 1:1 Aspect Ratio; Diagonal Size: 170; View Size: 120Hx120W; Overall Size: 131.3Hx126.5W MaxWhite 1.1 gain screen material with standard black backing to eliminate light penetration. 4 side black borders enhance picture contrast and absorb light overshoot Weight: 42.39