Shift Knob Manual Transmission (MT) Cars : Kazama Auto Shift Knob Silicone Black M12x1.25 M10x1.25 Choosing shift knob materials is difficult. Metal has weight and allows for solid shift work, but it gets hot in the summer and cold in the winter. Popular Duracon (plastic) knobs offer a wide variety of shapes but are light... making it easier to miss shifts... etc.! By using silicone as the material, the impact of missed shifts is absorbed. The iron base of the silicone provides a weight of 170g! (M12xP1.25) and (M10xP1.25) are included, making it compatible with most manual transmission cars! *M12xP1.25 Toyota, Subaru, Suzuki, and Daihatsu floor-mounted transmissions (MT) cars *M10xP1.25 Nissan, Mitsubishi, and Mazda There are no noticeable stains or dirt. It is written that it can be used with basically any manufacturer, but please check the compatibility yourself. Since it is a used item, please refrain from purchasing if you are sensitive to such things.