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SIDERMETcurrently run two convolute core winding machines at its factory in Boksburg, Gauteng, South Africa. These convolute core winders are employed to manufacture the cardboard cores (carton tubes) required to house the sensors for liquid metal probes. Convolute winding offers unique benefits specifically required by the liquid metal sensor market and cannot be provided for through spiral winding. Apart from its in-house requirements, SIDERMET have capacity to manufacture specific cardboard cores (carton tubes) for the outside market.