Excellent low-frequency soundproofing; The best flame retardant; Excellent acoustic properties; Environmentally friendly acoustic foam panel Sound absorption, warmth, heat insulation, good elasticity, wall decoration, shockproof, moisture-proof, anti-friction. Can be used in residences, recording studios and home theater schools, hospitals Environmental protection, automobiles, ships, architectural decoration, household appliances, etc. Color: Black Material: Foam Size: 12 x 12 x 24cm Package Contents: 18 x PCS Charcoal Acoustic Foam Only the above package content, other products are not included. Note: Light shooting and different displays may cause the color of the item in a little different from the real thing. The measurement allowed error is +/- 1-3 cm.