A homogeneous film of metal alloy is deposited on a high-grade ceramic body and conditioned to achieve the desired temperature coefficient. Plated steel termination caps are firmly pressed on the metallized rods. A special laser is used to achieve the target value by smoothly cutting a helical groove in the resistive layer without damaging the ceramic body. Connecting wires of electrolytic copper plated with 100% pure tin are welded to the termination caps. Alternative termination wires are available (for example, weldable wire for the MBA/SMA 0204 size only). The resistor elements are covered by a light blue protective coating designed for electrical, mechanical, and climatic protection. Four or five color code rings designate the resistance value and tolerance in accordance with IEC 60062.