Type: Acoustic Panels Color: Black Material: 100% Polyester Fibre Acoustic Panels Application: Audio Room, KTV, Meeting room Size: 30*30*5 CM 12 "* 12" * 2" Feature: Highly Effective Sound Absorption Thickness: bottom 1.5 cm, slot height 3.5 cm Product Name: Soundproof Board Polyester Fiber Acoustic Panels Certification: SGS