Red/Black Fing Fast Shift Knob For 6 Rul Speed Short Throw Shifter 10X1.25 K10 for Mazda MX-5 Miata The color will NEVER rub off or lose its shine! NO SET SCREWS! All-metal threads so your shift knob WON'T wobble or fall off. Perfectly sized at 2 1/8" diameter, the 4oz design feels ROCK-solid in your hand. Made in the USA! Sickspeed is PROUD to be American based, and American owned! F*ing Fast proudly displayed in place of 6th gear.