You are getting the item listed in the title, reference for size/length below. 

 BLOX Racing's stylish replacement mini antennas are CNC-machined from billet aluminum and anodized black. 

   Three different sizes are available as direct replacements for unsighly OEM antennas found on vehicles such as, Honda S2000, Honda Fit, Mitsubishi Evolution VIII, IX, and a other with similar antennas.

   Specifications

   THREAD PITCH = M5 X 0.8

   HEIGHT

•        SHORT =  2” H
•        MEDIUM = 3.1” H
•        TALL = 3.8” H

   BASE WIDTH

•        SMALL = 19.75MM
•        MEDIUM = 16.4MM
•        LARGE = 19.75MM