The short antenna is made of waterproof and durable aluminum alloy and carbon fiber. 1.37'', 3.15'', 4.72'' three sizes, Black, Blue, Red, Silver, Colorful four colors for your choice. The antenna is suitable for most cars and trucks with spiral radio antennas and is a good alternative. The antenna has strong signal receiving ability and can provide good broadcast signal receiving conditions. This product features a simple screw design that does not require cutting or drilling to alter your vehicle.