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USG Ceilings Plus® Illusions® Formed Metal Modular Ceilings Panels is a formed metal modular ceiling panel system consisting of variable width and length aluminum panels attached to a standard grid system. It is the ideal system for combining a fully accessable system with design flexibility and acoustical control. USG Ceilings Plus® Illusions® Formed Metal Modular Ceilings Panels are available in the following panel sizes: 24x 24, 24x 48, 24x 96, 30x 30, and 30x 60. These metal panels are installed in a convention grid system using a system of torsion springs. Additional information and design options are available at usg.com and cgcinc.com. These products generally fall under ASTM E1264 Section 5.2 designation as Type VII—Perforated aluminum (pan) with mineral or glass fiber base backing. CSI Masterformat number 09 51 33.