Triangle Solid Diffused Acoustic Panel Finish: melamin,veneer, anti-fire plate and metal finish etc. Triangle Solid Diffused Acoustic Panel Acoustic tissue: it's black color, sticked at the back side of the panel; it have anti-fire and sound absorption function. Triangle Solid Diffused Acoustic Panel Size: 2440x128x 25mm Triangle Solid Diffused Acoustic Panel Installation:Juse use nail to stap it on the wooden frame which is fixed on the wall. Triangle Solid Diffused Acoustic Panel application: It's widely used at meeting room, office space, music hall, huge stadium, school,cinema, restaurant,hospital etc. the places where need clear voice and sound absorption can use these products.