I have 2 rolls of dynamat. I bought this awhile ago and never used it. it is made to go under the hood of a car. each roll is 12 sq. ft. So that is 2 brand new rolls. Each one is around 80 bucks and I am letting them go for 50 each. They can be used inside of doors, underside of cars, trunks, etc..These help maintain road noise to a minimum.