18 pcs. Acoustic Foam Carbon/Black Bass Sound-Absorbing Trap Studio Sound-Absorbing Corner Wall 12X12X24 CmExcellent Low Frequency Sound-Absorbing Design Best flame retardant; Excellent acoustic properties; Environmentally Friendly Acoustic FoamSound absorption, heat, heat insulation, highly flexible, wall decoration, shock resistance, moisture resistance, friction resistance. It can be used in apartments, recording studios and home theater schools, hosipital environmental protection, automobiles, ships, architectural decoration, household appliances, etc.; Color: BlackMaterial: foamSize: 12x12x24cmPackage contents:18 pcs. x Acoustic Foam CharcoalOnly the above package content, other products are not included. Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement error is +/- 1-3cm.