General description 4X N3 Glow Plug Spark is designed for 1/10 and 1/8 RC truck nitro engine parts. This glow plug is suitable for 4c engines using 5%-40% nitro fuels, enhancing idle and transition performance. Technical specifications Item Model: N3 Size: 1.8*1.8*0.9 cm Material: Metal Color: Silver Package contents 4 * Glow Plug 4 * Gasket Other information Note: Light shooting and different displays may cause the color of the item to differ slightly from the real thing. The measurement allowed error is +/- 1-3 cm.