Red Bubble Shift Knob For Automatic Short Throw Drift Gear Shifter 6" 10X1.25 for Mazda Miata Made from high grade acrylic THESE KNOBS ARE NOT PAINTED. Maintains color and shine for a long time to come. Weighted at 272g (9.6oz) for increased positive shift. Starts at 48mm (1 14/16") and tapers down to 34.2mm (1 5/16) at the base. This drift knob is 152mm (6" long)