Neo Chrome Shift Knob For Manual Short Throw Gear Shifter Selector M12x1.75 Made from SOLID weapons grade 6061 aluminum. THESE KNOBS ARE NOT PAINTED. They are Neo-Chromed for a brilliant finish. 40mm (1 9/16") Diameter SUPER HEAVY &nbsp;knob weighs in at 11.8OZ Design feels super smooth and ROCK-solid.