4Pcs/Set Acoustic Foam 1Pc 15X15x15cm Square Sound Insulation Foam + 3Pcs 12X12x24cm Bass Trap Wall Foam Flame Retardant Highly Fireproof Made of High Quality Foam High Density Acoustic Foam for Maximum Noise Absorption Helps Flutter Echo and Reduce Excess Reflections and Reverberation Improves Voice Clarity and Acoustics of Your Room Applicable to: Recording Studios, Karaoke Room, Piano Room, Percussion Room, Anchor Room, home cinema, KTV, conference rooms, instrument rooms, etc. Color: BlackMaterial: Foam Size: 12cm x 12cm x 24cm/15cm x 15cm x 15cm Package Contents: 3 x Bass Foam Sound Insulation1 x Square Foam Sound InsulationOnly 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.