This shift knob is made from two types of laminated wood: walnut and white ash. The laminated wood is constructed by alternating the grain direction of each piece by 90 degrees to enhance the beauty of the wood grain. As a result, the color appears to change depending on the viewing angle. The manufacturing process is labor-intensive, so the price is set a bit higher. The finish is natural wax. Please check the thread size on your lever before purchasing. The thread size of the mounting part of this shift knob is 12 x 1.25mm. If your thread size is 10x1.25, 10x1.5, 8x1.25, 6x1.0mm, or 12x1.75mm, it can still be installed 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 (Teikeigai). 《 Other Custom Orders 》 We also accept custom orders for sizes and materials according to your specifications. Please contact us for a quote. 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 regarding other products is prohibited in the comment section.)