Y-Line Design: Soundproof panels adopt a Y-shaped design;achieve noise reduction and can be cut and assembled into different shapes;DIY into a variety of patterns Effective Noise Reduction: High-density materials effectively echoes and standing waves;greatly enhance sound clarity;for higher noise reduction requirements, install panels as a whole Easy to Install: Soundproof wall panels are self-adhesive;can be installed without additional tools;easily apply to walls, doors, , and ceilings How to Remove: If you need to remove the sound insulation panel, heat it with a hair dryer before peeling it off Note: With adhesive backing, the color and style of the adhesive backing are random, and specified color and style are not accepted Colour:Black Material:Polyurethane Package Contents: 12 x acoustic panel Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.