Features: 1) Usage: used as an effective sound deadening underlayment beneath ceramic and hardwood flooring and also suitable for a variety of other usages such as spaces and gaskets 2) Material: pure cork in small, medium, and big granules 3) Specification (W x T x L): 1.22m x 0.8mm - 12mm x 700 - 50m 4) Density: 180 - 200kg/cbm; 200 - 220kg/cbm; 220 - 250kg/cbm