Mushroom Gear Shift Knob for Volkswagen & PorscheShift with style! KaferLab's shift Knobs are handcrafted from the finest materials and then polished to a shine. No need to worry about inexpensive plastic knobs that are prone to crack and stripe out, as KaferLab knobs are offer metal threads! Traditional mushroom shape makes these knobs match traditional vehicles interiors. Available in several designs, colors, and materials. VW Bus Early Split Window > 10mm VW Bus Bay Window 1968 1979 > 12mm VW