This familiar hopper was an industry standard on many railroads since the 1930's. It was adopted by the AAR as a recommended design, but fell out of favor by the mid-1950s. While offering greater capacity over cars with conventional flat sides, the original open hoppers created corrosive interaction between acidic coal and the car's joints, leading to costly rebuilding programs.

• One piece plastic molded body
• Under frame
• Brake wheel
• Air tank
• Brake cylinder
• Triple valve
• Free rolling trucks
• Knuckle couplers
• Car weights