A must-have for your oil industry scenes! Surround your HO Scale Walthers Cornerstone United Petroleum Refining facility with a tank farm comprised of Tall Oil Storage Tanks with Berms. You can also use them at pipeline terminals, chemical companies, corn processing facilities, ethanol plants, port facilities and at railroad yards where they're used for fuel and oil storage. Easy-to-build kit creates a tall 500,000-gallon tank, and includes a stairway molded to fit the tank body, berm crossover stairways and decals. Also included are modular retention berms which can be used to combine multiple tall or wide tanks into a complete scene.