Built from aircraft quality 6061 and 6063 T6 alloy, as well as Sintra, a non-combustible, UL approved, recyclable plastic sheet material, Stealth Grande S6 is simply the largest, quality-build, trapdoor screen available on the market. A unique feature is the 6inch stressed roller tube which keeps the screen material flat and error free when deployed. These screens are working full-time in locations such as universities, major hotels and Fortune 500 companies giving amazing visual experiences to viewers. When not in use, the ceiling where the screen is housed looks precise and uninterrupted.