Alfa Romeo 2600 Touring Spider (1961-1968) number plate A number plate is stainless steel The number plate is made from 304 stainless steel (it never rust, even at different temperatures), After the number plate is finished, it is polished to high gloss. It looks like chrome. The current bumper models we have: Mercedes, Datsun, BMW, Volvo, Volkswagen, Jaguar...