The NGK X2120 is a high-quality 90-degree resistor spark plug cap designed to suppress electromagnetic interference (EMI) that can affect radio and TV reception. Featuring a 5k Ohm ceramic resistor, this cap is constructed from durable phenolic resin for excellent heat and high-tension resistance, and a robust rubber housing for superior vibration and moisture protection. It is suitable for spark plug wires with a 7mm diameter and spark plugs with a threaded stud or solid terminal. This genuine NGK component ensures reliable ignition and reduced electrical noise in various small engine applications.