SIUAKUSTIK Type 13/3 wooden acoustic planks are probably the most popular grooves panel convinces with good absorption performance. Groove in front of the panel is 3mm, the distance between each groove is 13mm.  

Type 13/3 can be used in all areas like ceiling,wall and is basically universal product.  

Base plate: MDF, Wood plastic panel, etc.
Surface: Veneer, melamine, RAL painting, etc.
Width: 128mm, etc.
Custom made available.