1 . Hot SparkGlow Plug is suitable for T- 3.3, , VOLCANO , TORNADO S30, VOLCANO S30, 21, HURRICANE XL, 3.0, 3.5, Glow Plug 4 fits for BACKDRAFT 3.5, CALDERA 3.0, EARTHQUAKE 3.0, EARTHQUAKE 3.5, HURRICANE XP, 21, , , MONSOON XP, SANDSTORM 21 .2 . Hot SparkGlow Plug is for RC Nitro Engines Car Truck , Glow Plug improves idle and transition.3 . Hot SparkGlow Plug is for 4c Engines 5% - 40% Nitro Fuels, Spark Medium Hot Nitro Engine Parts very well on RC cars.4 . Hot Glow Plug is made of Metal, Spark Medium Hot Nitro Engine Parts are of high quality.Colour:As ShownMaterial:Metaltype:N4Package Contents:6 x RC Car Glow PlugOnly the above package content, other products are not included.Note: Light reflection 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 +/- 1-3cm.