Item Name: Glow Plug For 4c Engines For 5%-40% Nitro Fuels Improves Idle and Transition Plus Item Model: N3 Size: 1.8*1.8*0.9cm Material: Metal Color: Silver Package Contents: 3 * Glow Plug 3 * Gasket Only the above package content, other products are not included. Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3 cm.