MBI original Shadow-Coustic Acoustical Pads are guaranteed to provide maximum acoustical performance. They are available encapsulated in any color PVC or they can be faced when optimal sanitary conditions are not necessary. Shadow-Coustic Pads are intended for use with perforated metal ceilings, wood ceilings, or linear paraline ceilings. All are fire rated Class A per ASTM E-84 25/50. Thicknesses, densities, and color finishes are limitless.