J-Specialty Brushed Aluminum Round Gumball Shift Knob M10x1.25 Thread for Manual Trans for Mazda 3, Miata, Genesis & Evolution Brushed Aluminum Finish Round Ball Shift Knob 2 Inches Thread Pitch is M10x1.25 This Shift Knob is made from Billet Aluminum CNC Machined Includes Locking Nut 185 Grams (6.5oz) Will Only Fit Manual Transmission