10x1.25mm Thread 6 speed JDM Round Ball Shift Knob in Black Billet Aluminum for Mazda Miata RX8 RX-8 VMS Racing Type-R Style 6 Speed / 10x1.25mm Thread Pattern Brand New, Never Used. Weight: 6.1 ounces, Diameter: 2 inches, Height: 1.75 inches Made to Manufacturer Standards for easy Installation. NO drilling or tapping required. Shift Knob is 10x1.25mm and Might Fit Other Brands of Vehicles with same thread and shift pattern. Unique, Locking Nut system. Made from one piece of solid Aircraft-Quality T-6061 Billet Aluminum and Precision-Machined for a firm, reliable feel against your palm for positive shifting.