Molten metal seizing up in your cover plate is a thing of the past with our new design Cover Plate with integrated collar and liner. This rubber collar covers the top of the cover plate hub and  the inside of the hub. Molten metal will not stick to the silicone rubber from which the collar is made. The Contenti Company manufactures the collar from high tear strength Nicem silicone. Not for use in Contenti casting machines.