Estes Vapor Flying Model Rocket Kit 7294 disappears into the sky on D and E engines, like a puff of smoke. This is not for the faint of heart as an advanced build model rocket. Made for adrenaline junkies. After carefully crafting this sleek model, take Estes Vapor to the flying field to feel those massive 24mm motors rumble through your chest as it soars up to 900 ft.