This is the vacuum storage Tank Reservoir Canister for a 1955 - 1956 Cadillac. This should fit all models Cadillac's for those years including Eldorado, but please verify that it is correct for your application before buying it. This mounts on the firewall and the vacuum hoses run to it. This is in excellent condition, it has been sanded and re-painted and is ready to instal on your car. Sold As Is, As Shown.