BC Corona Brand. Original lang Made of PU leather, ABS plastic (acrylonitrile butadiene styrene), and nylon and metal Diameter 31 mm with replaceable derailleur hanger mechanism Suitable for vehicles with and without reverse gear Elegantes Design. Universelle Passform The gear knob comes with 3 interchangeable plates, 2 plates for 5 gears and one for 6 gears and several adapters to adapt the gear knob to the gear lever The product is presented with a mounted plate, in this case a 5-speed plate, which can be replaced by one of the other two included in the blister pack Note The buttons are suitable for both 5 and 6 speeds.