Sonex Junior Acoustical Foam is the same pattern as our famous Sonex Classic Foam except that the panel size is smaller and the number of panels per box is fewer. The Junior panels are 2' x 2' rather than 2' x 4'. Sonex Junior is offered in two versions, the standard being a Melamine foam (part # SJO2) which is Class 1 Fire Rated and 100% fiber free. This foam is white, however, it has on option for a painted surface in charcoal, beige, brown or blue. The second version is a polyurethane foam (part # SJN2) which is more economical, however, it is not Fire Rated. The polyurethane version comes in charcoal, beige or brown.