The invention refers to a container for optical disks, a tray for such container and a magazine type player adapted to be used with such container. The balance gain may be associated with a spatial image in the sound field. The side rail provides a retaining structure above and around the perimeter of the platform in the cargo position, and is generally coplanar with the front, side and rear walls of the cargo box in the cargo position. 5\u201320% of a nitrogen-containing organic compound; and an inert component, the rest up to 100%; wherein, the above described catalyst is used for demercaptanization or sweetening of hydrocarbon compositions. Preferably, the coupling between the plate and attachment member allows rotation in three dimensions thereby allowing the plate to rotate relative to the interbody device.