https://usa.yamaha.com/products/musical_instruments/winds/trombones/ysl-354vc/index.html
YSL-354VC - Overview - Trombones - Brass & Woodwinds - Musical Instruments - Products - Yamaha -...
Standard Series, Key:C, Bore: M: 12.7mm (0.500"), Bell: Yellow-brass, 204.4mm (8"), Weight: Standard, Side material: Nickel silver, Finish: Gold lacquer
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https://th.yamaha.com/en/musical-instruments/brass-woodwinds/products/trombones/ysl-354v-354vc/
YSL-354V/354VC - Overview - Trombones - Products - Brass & Woodwinds - Yamaha - Thailand
Student Valve Trombones.
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