Thank you for viewing! Wooden piston buttons for YAMAHA euphonium. I actually used these on a YEP-321S for about a year. They were very easy to press, and the wood felt great on the fingers. The diameter is about the same as a custom model. (Klang's rubber felt fit.) I am selling them because I am replacing my instrument. There is black discoloration on the back (as you can see in the third photo). The last photo is an image I borrowed from the actual product page. ※ YAMAHA 2: Used on models other than the Custom series with serial numbers #100,001 and later. Please check compatibility before purchasing. ※ The following is a product description: ------------------- ・Features 1) Prevents sound diffusion and leads to a tighter sound. 2) The beautiful wood grain of the natural material is soothing. 3) The fit on the fingers is superb. ・Product Description 1) Type / EY type (body is machined from solid brass, heavy type) 2) A Black / Wood top material ※ Please remove the original spacer in the recess on the back of the button and use it. If the size is different, please process felt or cork material and attach it. 4) Metal fittings body: Machined brass, no lacquer finish ・Size: Outer diameter 20.5mm x Top part (wood part) 17mm About 1mm larger than the standard button, and the finger action is more stable! ------------------- ・We are careful to pack the item carefully, considering impact and water damage. ・We basically reuse packing materials, boxes, and bags, so please purchase only if you understand this. ・Returns and refunds are generally not accepted. ・Please understand that this is a USED item. ・The account name in the product image is for preventing resale. (Because it was resold in the past) #Euphonium #Piston #Wooden #CustomParts #BrassInstrument