Thread 14mm x hex 13/16" x pitch 1.25mm. Heat range 8. Reach 19mm (3/4"). Fine wire nickel alloy centre electrode. 0.7-0.8mm gap. ...
Thread 12mm x hex 18mm x pitch 1.25mm. Ceramic resistor. Heat range 8. 19mm (3/4") reach. 0.6mm fine wire iridium centre electrode. 0.7...
