At Amazon, get this 150" Portable Projector Screen for $80. It's the best price Amazon has charged for this set.
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Features 150" screen with a 16:9 aspect ratio and 160-degree viewing angle Supports both front and rear projection Foldable, washable screen material designed to resist wrinkles All-metal bracket stand with a tripod base extended to 35" Includes a carry bag measuring 35" x 5" for storage and travel