Simplex Ceilings "D" Series has an integral filler strip that gives a soft, even appearance. This metric panel, in 100mm or 200mm modules, can be perforated for sound absorption. The "D" Series various splicing components and perimeter details result in a ceiling that offers good design as well as pragmatic use of a major interior surface. Accessibility System can be supplied with an access door for easy access to the plenum. Panels Roll formed rectangular shapes, are available in a wide range of sizes - Contact us for more information (800-638-5726) or our Agent representative in your area for more details of this system capabilities and limitations. Curved: Please see curved panels section. Perforations Series comes only in standard perforation AL-21. Please consult the factory Perforations link for more information. Finishes Select from Simplex Ceilings standards for "D" Series. Please consult the factory Finishes link for more information. Acoustics Come with black acoustical textile membrane laminated to back of perforated panel. Please consult the Acoustical link for more information. Fire Rating All metal panels and associated suspension systems are Class I, 0-25 Flame Spread, as tested in accordance with ASTM E84. For more technical details, please refer to our Architectural Specifications and/or Technical Data links. Contact us (800-638-5726) or our Agent representative in your area.