/Euphonium Small Shank Jc Custom Harmonic 52. Internal Edge: 26,00 mm. Finish: Gold, Silver, Custom, Gold Edge. /euphonium Small Shank Jc Custom Harmonic 52" is in sale since Monday, March 7, 2016. This item is in the category "Musical Instruments & Gear\Brass\Trombones".The seller is "dicord-us" and is located in Joinville, SC. This item can be shipped worldwide.