Rxmotor Fing Fast Shift Knob for 5 Speed Short Throw Shifter with M8x1.25, M10x1.5, M12x1.25 Adapter Thread (BLACK-BLUE) This Item Only Have M8x1.25 / M10x1.5 / M12x1.25 Adapter Thread Size of this shift knob is around 2.125" in Diameter. Weight Around 5-6 oz. Rocking Solid Feeling Direct Bolt-on with No Modification Required Strong Single Molecule Bond, To Help Stay Cooler In Summer And Warmer In The Winter Engraved Design Shift Pattern To Add Classic Feel To Any Ride