Highly exothermic insulating sleeves * highly exothermic insulating sleeves for feeder of pieces, melted in iron, steel and all the alloys of those metals, cast in sand and other systems. These sleeves provide good pieces, without porosity and without reaction of the metal with the sleeve. Moulding mode: Manually, pressure, blow explosion, impact. Melting applications: Steel (carbon steel, high and low alloy, stainless, hadfield) Iron (malleable, nodular, grey, high and low alloy) * highly insulating sleeves for feeder of pieces melted in iron, steel, copper, aluminium and all the alloys of these metals, cast in sand and other systems and specially for very low stainless steels in carbon. These sleeves provide good pieces, without porosity and without reaction of the metal with the sleeve. Moulding mode: Manually Melting applications: Steel (carbon steel, high and low alloy, stainless, hadfield) Iron (malleable, nodular, grey, high and low alloy) Copper and its alloys Aluminium and its alloys Box quantity depends on the sleeves' dimensions