This is a shift knob made from a laminated wood consisting of 10 layers of Wenge (black) and White Ash. The laminated wood is made by alternating the grain direction of each piece of wood by 90° to create a beautiful grain pattern. Because of this, the color appears to change depending on the viewing angle. The manufacturing process requires a lot of steps and is time-consuming, so the price is set a little higher. The finish is natural wax. Please check the thread size on the lever side before purchasing. The thread size of the shift knob's mounting part is 12 x 1.25mm. If your thread size is 10x1.25, 10x1.5, 8x1.25, 6x1.0mm, or 12x1.75mm, you can still install it by using the following optional diameter conversion adapters. << Diameter Conversion Adapter Sizes (sold separately) >> ① 12x1.25mm (knob side) → 8 x 1.25mm (lever side) ② 12x1.25mm (knob side) → 10 x 1.5mm (lever side) ③ 12x1.25mm (knob side) → 10 x 1.25mm (lever side) ④ 12x1.25mm (knob side) → 6 x 1.0mm (lever side) ⑤ 12x1.25mm (knob side) → 12 x 1.75mm (lever side) (← This adapter will be 23mm longer) 《 Delivery Method 》 Free shipping, but it will be sent via regular mail (Teigai-gai Yubin). 《 Other Custom Orders 》 We also accept custom orders for sizes and materials according to your requests. We will first provide an estimate. If you are interested, please feel free to contact us through the inquiry form on the "Wood Studio Craft Miya" website. (Please note that communication about other products is prohibited in the comments section of this product.)