The Atlas model of the 20,700 gallon tank car was introduced in the mid-Sixties by General American Transportation Corporation, more commonly known simply as GATX. The design is a general-purpose, non-insulated, non-pressure tank car. The Atlas model recreates two major saddle variations (Type 10 and Type 20) and two top platform variations (one- and two-piece). The more common products carried in this tank car were tallow, animal fat, fuel oil, diesel fuel, vegetable oil, soybean oil, fertilizers, lubricating oil, waste oil, and glycol. 

Detailed five section non-insulated body
Two saddle variations (Type 10 or 20)
Detailed top platform with two options (one- or two-piece)
With A-end pipe stubs (where applicable)
See-through end walks
Detailed brake gear and pipes
Bottom outlet
Safety vent
Manway
Control housing
Stuffing box
Safety rails
Correct lettering to prototype cars