Material: synthetic rubber, open cell structure. Temperature range:Low Density: -20℃to+85℃ Thermal Conductivity: Low Density:0.047W/(M.K) High Density: 0.052W/(M.K) Options: We have two kinds of density, low density with 160kg/M3 and high density with 240kg/m3. Fuction: sound absorbing, shocking absorbing.