Size :500x500x20mm Load Capacity (Kg.):02 to 05 Natural Frequency (Hz):15-35 Thickness (mm):20 Coeff. of Friction:0.8 Shore A Hardness:80-82 Working Temp Range °C:-20 to +70 Weight ( Kg.):7.3 Material: Nitrile Rubber, Cork, Synthetic Fibre and Other High Gread Compounds. Colour:Green, Grey, Black https://www.vibrationmountsindia.com/insulation-plates/