Feature: Best for controlling sound reflections in small rooms. Gives you a more enjoyable sound by effectively controlling harmful reverb and echo. Suitable for recording studios, control rooms, offices, vocal sheds, etc. Specification: Material: High density Sponge, Soundproof and flame retardant Size: 30 x 30 x 2.5cm Qty: 10Pcs Color: As the picture show includes: 10 x Soundproof Sponge