Refractory laddles sleeves are equipped with stopper rods to control the flow of metal during casting. These metal stopper rods are pivoted at the top of the ladle and pass vertically through the molten metal to the nozzle at the bottom. To prevent stopper rods from being attacked by the molten metal they are incased in fire-clay sleeves. The number of sleeves required (from 5 to 9) on a rod varies according to the depth of the ladle. The sleeves are joined by fire-clay cement. All sizes with different ODs available as per users specification.