Quick overview from the supplier:
Manual Screen Rear Projection Reflecta SilverLine Rollo, 180x190cm canvas/view area, 1.6 gain
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https://reflecta.de/en/silverline-rear-projection/344-reflecta-rollo-silverline-180x190-cm-11-rear-projection.html
Product details:
• Mounted to wall or ceiling.
• Simple installation and easy handling.
• Large viewing angle.
• Suitable for rear projection.
• High-quality screens available in RückPro (1.6 gain) quality.
Format 1:1
Gain 1.6
Viewing angle 120°
Fabric weight/m² 420 g
Fabric thickness 0,32 mm
Fire protection class M1
Weight 6 kg