Size :500x500x50mm Load Capacity (Kg.):03 to 12 Natural Frequency (Hz):08-05 Thickness (mm):50 Coeff. of Friction:0.8 Shore A Hardness:90-92 Working Temp Range °C:-20 to +70 Weight ( Kg.):19.7 Material: Nitrile Rubber, Cork, Synthetic Fibre and Other High Gread Compounds. Colour:Green, Grey, Black https://www.vibrationmountsindia.com/insulation-plates/