1.Eco-friendly ,E1 2.Perfect decorcative surface 3..Dust free 4.High sound absorption coefficient Materials Introduced Mantex ... pattern on the reverse side,is available in many models including 28/4,14/2,13/3,59/5.38.5/4,etc ... client request)Regular Model13-3,14-2,17-4,18-3,28-4,29-3,38.5-4,40-3,59-5,60-4 ...