Hello Zedders, this is as it says, Custom made gear knob with a custom cut 350Z logo on the side with the gear numbers and R cut into the top face, which is custom painted to match your car colour or interior or even your engine bay. These are made out of billet aluminium and mirror polished for bling, they are a very good weight (i will post the exact weight tomorrow) which helps the actual gear change no end, after several attempts this is the size that found to work best, Diameter is 38 mm