The Replacement HD Progressive 1.1 Perforated Surface for 119" Da-Snap Projector Screen from Da-Lite has a gain of 1.1, 170° viewing angle, and is used in applications where projector brightness and screen size require an increase in gain. The white surface offers true color reproduction and fidelity. The perforated vinyl surface allows for the installation of speakers behind the surface. HD Progressive 1.1 Perf can be cleaned with mild soap and water, is flame retardant and mildew resistant. This surface has achieved GREENGUARD GOLD Certification.