Egg crate PU acoustic foam commonly used in recording studios, room acoustics , speakers, multi-purpose hall, sound absorbing surface and packaging. Density 25 is most selling and in stock. Product feature - Reduce echo up to 99%. Medium sound absorption capability. Cost-effective and easy to install. Clean surface but non water-resistant and non-dampproof. Tolerance about (+/- 5mm) for length, width and thickness. Non fire-retardant. Produce in local, mediumweight quality guarantee.