Felt Insulator, Top Of Radiator Stone Guard, Series I E-Type. Missing from the vast majority of E-Types and a frequent concours point deduction -- if the judges know it should be there, of course! Supplied with fitting instructions. Illustration item 18This felt strip is attached to the top of the radiator stone guard on all Series I E-Types. It is missing from the vast majority of cars. As a result, it is a frequent source of concours point reductions. Supplied with fitting instructions.