Armstrong’s Altitudes Torsion Spring custom ceiling system allows designers to specify a monolithic visual in large-size panels. The sag-resistant panels are 100 percent downwardly accessible and are available flat or curved in custom sizes up to 4 by 12 feet or 5 by 10 feet. Made from metal-framed fiberglass with a 1/8-inch reveal, the panels have an NRC of 0.85, which means they absorb 85 percent of the sound that strikes them.