THE PRIME CUT EXOTHERMIC CUTTING ROD IS COMPRISED OF A SEAMLESS COPPER COATED STEEL TUBE(WHICH SERVES AS THE OUTER CASING)CONTAINING ALLOY FUEL WIRES. THE INTERIOR WIRES ARE ARRANGED IN A CIRCULAR PATTERN WITH A CLEAR CENTER OXYGEN PATH. THE WIRES ARE RETAINED WITHIN THE TUBE BY CIRCULAR CRIMPS. THE ROD ENDS ARE MACHINED TO A SMOOTH SURFACE TO ATTAIN A TIGHT SEAL WITHIN THE TORCH AND ENSURE LONGEVITY OF THE NEOPRENE COLLET WASHER. CUTTING RODS 3/8 X 18 50 ROD BOX