Harger Ultraweld® UltraShot® 250-g Drop-in weld metal has copper oxide and aluminum as the main composition materials. It is packed in moisture resistant copper drop-ins. This copper drop-in is marked with size and is consumed during the reaction process. This long lasting and reliable weld metal is ideal for exothermic welding to connect cable to rod/steel. Weld metal is RoHS compliant.