uxcell a15060100ux0375 Gear Shift Knob Product Name: gear shift knob; package Content: 1 x gear shift Knobs adapters) Color: Blue; Material: Aluminum, carbon fiber Dimension: 48 x 50mm/1.8" X 2"(H*D) Inner Hole diameter: 10mm/0.4" Adapter thread Diameter: 11.5 x 8mm/0.45" X 0.3"(Od*id)