Carlisle Brake & Friction's EC20 brake block is rated for 20,000# axle loads and was specifically developed for the price sensitive fleet operator. This standard grade brake lining meets the requirements of F.M.V.S.S. #121 dynamometer testing standards. EC20 was designed for use with S-cam air brakes on trucks, tractors, and trailers operating in long haul, on-highway freight applications that do not require a severe service lining.