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TrinityRail offers a complete line of Rapid Discharge® hopper cars including the aluminum R.D. VI (pictured). This 4,207-cubic-foot, open hopper car offers the lightweight advantages of aluminum construction with a steel underframe for strength and durability, the company says. The fully adjustable door system is easy to operate and maintain and most adjustments can be done in the field to minimize downtime, the company adds. The door system is designed to help maintain a positive seal to mitigate coal dust leakage. Replacement components, field service support, and leasing and management options are available.