Piezo push button ignitor No battery, Just press a trigger to spark and ignite the fuel 18 mm diameter mounting hole. Output voltage: >=18kv, Length: 9cm/3.54inch; Fits easily into your setup, offering a reliable ignition solution for propane, LPG, and natural gas applications Applicable Gas: LPG propane gas and natural gas; Temperature-resistance: -20°C to 120°C Rated for 50,000 Sparks. Adjustable Sparking Distance: 2-3mm;Press the trigger to generate a spark and ignite your fuel, making it ideal for classic spud gun potato cannons or BBQ grills The total length of the piezoelectric is 9cm, and the diameter of the outer cover is 2.6 cm for high performance potato cannon igniter 3-pack piezo push button ignitor for Moon cannon-covered classic Piezo Igniter. Potato guns require a trigger to spark and ignite the fuel.Our igniter is backed with a 1-year warranty.