This is a shift knob made from a laminated wood of Japanese zelkova and white ash (white). The laminated wood is made by alternating the grain direction of each piece of wood by 90° to enhance the beauty of the grain. Therefore, the color appears to change depending on the viewing angle. The manufacturing process requires a lot of labor and time, so the price is set a little higher. The finish is natural wax. The thread size of the mounting part of this shift knob is 12 x 1.25mm, but it can also be installed if the thread size is 10x1.25, 10x1.5, 8x1.25, 6x1.0mm, and 12x1.75mm by using the separately sold diameter conversion adapter below. << Diameter Conversion Adapter Sizes (sold separately) >> ① 12x1.25mm (knob side) → 8x1.25mm (lever side) ② 12x1.25mm (knob side) → 10x1.5mm (lever side) ③ 12x1.25mm (knob side) → 10x1.25mm (lever side) ④ 12x1.25mm (knob side) → 6x1.0mm (lever side) ⑤ 12x1.25mm (knob side) → 12x1.75mm (lever side) (←This adapter will be 23mm longer) 《 Delivery Method 》 Free shipping, but it will be sent by regular mail (Tei-gai postal service). 《 Other Custom-Made Products 》 We also accept custom orders for sizes and materials according to your requests. Please contact us for a quote. If you are interested, please feel free to contact us through the inquiry form on the HP of "Wood Workshop Craft Miya". (Please note that exchanging messages about other products in the comment section of this product is prohibited.)