Office units are mobile storage for the work station. Office units come with shelves, doors, drawers, suspension file drawers and pen trays. Office units are fitted with four castors, all with brakes. All drawers which have a stability system are finished on the inside in white-pigmented solid beech and fitted with double ball bearings to allow 100% extension. Drawers for suspension files include aluminium rails and all pen tray drawers include pen trays.