Size :600x600x15mm Load Capacity (Kg.):01 to 04 Natural Frequency (Hz):07-20 Thickness (mm):15 Coeff. of Friction:0.8 Shore A Hardness:40-45 Working Temp Range °C:-20 to +70 Weight ( Kg.):5.1 Material: Nitrile Rubber, Cork, Synthetic Fibre and Other High Gread Compounds. Colour:Green, Grey, Black https://www.vibrationmountsindia.com/insulation-plates/