These 18" square molded pads can be used to effectively control noise and vibration. Available in 60 Durometer Neoprene, Natual Rubber, and Nitrile (Buna-N). The pads are available in both single and double sided ribbed construction. There is a 1/8" drop between each rib. They can easily be cut into any deisred shap and can be used in multiple layers to increase deflection.