Profile: A. L. Doering Spark Plugs Corp. manufactures spark plugs for hard starting, oil fouled, gas fouled, wet, high energy, lawnmower, chainsaw, mini-bike, marine and farm equipment. Our plugs are fully automatic and adjust to each spark demand in every cylinder under fire. Plug's center electrode is made of inconel #600 stainless steel and aircraft quality insulator. This enables the plug to resist corrosion from the gas-oil mixture remaining in the combustion chamber. Brands include Aldor Spark Plugs™ and Aldor Oxygen Sensor™.