Decosorber Natur are absorbers most effective for mid frequencies. Made from highest quality polyester foam, coated with a black velvet layer and covered with a 4mm Poplar plywood plate. Available in 3 designs: QUAD, SERTA, EVA and 4 colors: Walnut, Ebony, Mahogany, Natural Poplar. The plates are carefully lacquered and finished with oil and wax on top. The result is a mid glossy finish for a warm ambience.