Legionaries helmet in Gladiator movie

[X1WOW]

            Hello, I have seeing recently a roman relief where the legionaries are crearly using this type of helmet, and I recogniced instantly that those are exactly the ones used in the movie Gladiator. Since the day I watched the movie, i have always though those were just your typical Hollywood fiction looking roman helmets, but this relief crearly says otherwise. Did this type of helmet really exist? Do they have a name? The look a more advanced version of the coolus helmet, but I have never seen any in any museum or in the internet.