Material: Aluminum + Carbon Fibre Length: 8cm (3.5") Bottom width: 1.5cmInclude: adapters in 4 common sizes Easy installtion，No any modification.It also fit Most Vehicles With Screw-On Type Antenna Base. Attention: This Item is For AM/FM radio only. Does NOT compatible with satellite radio and/or GPS system.Please Do Not Buy if Your Vehicle Does Not Have Screw In Type Antenna Package Include: 1 x Carbon fiber antenna 4 x Different Size Stud bolts2 x Plastic Rings