These raised letters are laser-cut from 1/8″ thick non-yellowing hi-temp vinyl with a gloss finish. They are precision-cut to fit into the recesses cast into your 32v cam covers. Not a thin paper decal, but a bubble-top applique that can be washed and waxed with the rest of your car. The letters are finished with a durable polygem urethane finish and will not harden, yellow or crack. Will handle under-hood temps without a problem.