A quality replacement 6 Volt coil. Similar in appearance to the original Lucas equipment (AT WELL OVER HALF THE COST ). Fits Triumph, Norton and BSA's that have a 6 volt system or electronic ignition installed. This works great with a Boyer which likes it's coils to have under 5 OHMS. This Coil has 1.9 OHMS which in series comes to 3.8 OHMS which means great spark.