Flooring underlay Density:22,30~160kg/m3 Thick: 2mm,3mm,4mm... ... ,1.37m,1.83m...ect Material: PE,PVC,XPE,Mesh... Flooring underlayDensity:22,30~160kg/m3Thick: 2mm,3mm,4mm...ectWidth: 1 ... ,anti-sound,avoid moisture,environmentally friendly...Packing: Roll packing with plastic bags,about 18.6sq.m/roll,450-700rolls per 20ft ...