Sonex™ Mini is designed for use in environments where high frequency noise control is required. Its unique sculpted pattern allows for a maximum handling of high frequency sound waves. It is offered in two versions, the standard being a Willtec foam (part #MSO) which is class 1 fire rated and 100% fiber-free. The color is white or light grey, but there is an option to have the surface painted (part #MSO-P) in charcoal, beige, brown or blue. The second version of the Sonex™ Mini is a polyurethane (part #MSX) which is more economical, however that is not class 1 fire rated. Standard color for the Polyurethane version is charcoal, beige or brown.