Bulk (or bulk cargo) containers have three loading hatches in the roof, each of a diameter of approx. 455 mm (1 3/4'). The distance between the hatches (center to center) is 1.83 m (6'). On the door side, there are two discharge hatches, which are sometimes equipped with short discharge tubes for guiding the bulk cargo. Alternatively, two unloading hatches may be mounted in the doorways, for emptying the containers. Bulkcontainers are used in particularfor transporting bulkcargo, such as grain, feedstuffs, spices. However, they may also be used for transporting general cargo.