ThesePerfectr railcars typically offer capacities from 5,700 to 6,000 cf, 10 hatches and pneu gates, and transport medium-weight commodities such as polyvinylchloride (PVC) and polystyrene (PS). 6,000 - 6,500 cf. ThePerfectst pneu covered hopper cars typically offer capacities from 6,200 to 6,400 cf, 10 hatches and pneu gates, and